1. A
   Interferon
2. B
   Antibiotics
3. C
   Morphine
4. D
   Anti-retroviral drugs

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1. A
   (a), (b) and (c)
2. B
   (a) and (b) only
3. C
   (a) and (c) only
4. D
   (b) and (c) only

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1. A
   Reproduces sexually in liver cells
2. B
   Reproduces sexually in RBCs
3. C
   Gametocytes develop in mosquito gut
4. D
   Fertilization takes place in mosquito gut

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1. A
   A-II, B-I, C-IV, D-III
2. B
   A-I, B-II, C-IV, D-III
3. C
   A-III, B-IV, C-II, D-I
4. D
   A-IV, B-I, C-III, D-II

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1. A
   $3 \times 10^8$
2. B
   500
3. C
   $3 \times 10^{10}$
4. D
   400

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1. A
   A-IV, B-I, C-II, D-III
2. B
   A-III, B-II, C-I, D-IV
3. C
   A-I, B-IV, C-III, D-II
4. D
   A-II, B-III, C-IV, D-I

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1. A
   $\dfrac{5}{3}$ A
2. B
   $\dfrac{5}{9}$ A
3. C
   $\dfrac{1}{3}$ A
4. D
   $\dfrac{15}{2}$ A

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1. A
   900
2. B
   600
3. C
   150
4. D
   300

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1. A
   K.E. constant (horizontal line) with time
2. B
   K.E. sinusoidal, symmetric about a non-zero level, going below it
3. C
   K.E. as a series of positive humps ($\cos^2$-like), touching zero at $T/2$ and $T$
4. D
   K.E. sinusoidal about zero, going negative

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1. A
   10 V
2. B
   1.2 V
3. C
   12 V
4. D
   10.8 V

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1. A
   $\dfrac{\sqrt{7}}{2}$
2. B
   $\dfrac{7}{4}$
3. C
   $\dfrac{7}{2}$
4. D
   $\dfrac{2}{\sqrt{7}}$

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1. A
   45$^\circ$
2. B
   35$^\circ$
3. C
   40$^\circ$
4. D
   55$^\circ$

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1. A
   A-IV, B-I, C-II, D-III
2. B
   A-IV, B-III, C-II, D-I
3. C
   A-I, B-IV, C-III, D-II
4. D
   A-IV, B-III, C-I, D-II

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1. A
   $2.1 \times 10^{-9}$ m
2. B
   $2.1 \times 10^{-8}$ m
3. C
   $2.1 \times 10^{-10}$ m
4. D
   $2.1 \times 10^{-11}$ m

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1. A
   2.1
2. B
   1.8
3. C
   1.5
4. D
   1.2

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1. A
   5 $\mu$F, 125 $\mu$C on $C_1$ to $C_4$ and 25 $\mu$C on $C_5$
2. B
   5 $\mu$F, 125 $\mu$C on all capacitors
3. C
   5 $\mu$F, 250 $\mu$C on all capacitors
4. D
   4 $\mu$F, 250 $\mu$C on $C_1$ to $C_4$ and 125 $\mu$C on $C_5$

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1. A
   $2\,mgR$
2. B
   $mg\dfrac{R}{4}$
3. C
   $mgR$
4. D
   $mg\dfrac{R}{2}$

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1. A
   7.654
2. B
   7.6
3. C
   7.65
4. D
   7.7

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1. A
   C only
2. B
   D only
3. C
   B only
4. D
   A and E only

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1. A
   0.2 m/s
2. B
   1.41 m/s
3. C
   14.1 m/s
4. D
   2.0 m/s

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1. A
   $\dfrac{K}{4}$
2. B
   $K$
3. C
   $2K$
4. D
   $\dfrac{K}{2}$

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1. A
   Two positive humps (full-wave rectified positive)
2. B
   Full sinusoidal waveform (positive and negative)
3. C
   Two negative humps (full-wave rectified negative)
4. D
   One positive hump then flat (half-wave positive only)

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1. A
   13.5 kHz
2. B
   10.1 kHz
3. C
   20.7 kHz
4. D
   15.9 kHz

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1. A
   A is true and B is also true
2. B
   A is false, but B is true
3. C
   A is true, but B is false
4. D
   Both A and B are false

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1. A
   $0.08\pi$ rad
2. B
   $0.8\pi$ rad
3. C
   $8\pi$ rad
4. D
   $0.008\pi$ rad

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