1. A
   $x+2y-1=0$
2. B
   $x-2y-1=0$
3. C
   $2x+y+1=0$
4. D
   $2x+y-1=0$

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1. A
   1
2. B
   2
3. C
   3
4. D
   4

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

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1. A
   $\dfrac{(\pi-2)a^{2}}{4}$
2. B
   $\dfrac{(\pi-1)a^{2}}{4}$
3. C
   $\dfrac{(\pi-2)a^{2}}{2}$
4. D
   $\dfrac{(\pi-1)a^{2}}{2}$

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1. A
   $\dfrac{(3\pi-2)a^{2}}{4}$
2. B
   $\dfrac{(3\pi+2)a^{2}}{4}$
3. C
   $\dfrac{(3\pi-2)a^{2}}{2}$
4. D
   $\dfrac{(3\pi+2)a^{2}}{2}$

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1. A
   -2
2. B
   -1
3. C
   1
4. D
   2

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1. A
   15
2. B
   14
3. C
   13
4. D
   6.5

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1. A
   4
2. B
   2
3. C
   1
4. D
   -1

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1. A
   (1, 2, 10)
2. B
   (-1, -2, 10)
3. C
   (11, 12, -10)
4. D
   (11, 2, -10)

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1. A
   $3\hat{i}+4\hat{j}+2\hat{k}$
2. B
   $5\hat{i}+2\hat{j}+2\hat{k}$
3. C
   $5\hat{i}-2\hat{j}+6\hat{k}$
4. D
   $3\hat{i}+3\hat{j}+4\hat{k}$

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1. A
   $\dfrac{\pi}{2}$
2. B
   $\dfrac{\pi}{3}$
3. C
   $\dfrac{\pi}{4}$
4. D
   $\dfrac{\pi}{6}$

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

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1. A
   $-\dfrac{32}{81}$
2. B
   $-\dfrac{16}{81}$
3. C
   $\dfrac{16}{81}$
4. D
   $\dfrac{32}{81}$

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

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1. A
   2
2. B
   3
3. C
   $\sqrt{6}$
4. D
   $\sqrt{3}$

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1. A
   1
2. B
   2
3. C
   3
4. D
   4

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1. A
   1
2. B
   2
3. C
   3
4. D
   4

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1. A
   18
2. B
   16
3. C
   15
4. D
   14

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1. A
   1
2. B
   2
3. C
   3
4. D
   4

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1. A
   2
2. B
   3
3. C
   4
4. D
   Degree does not exist

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1. A
   -1
2. B
   0
3. C
   1
4. D
   2

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1. A
   -1
2. B
   0
3. C
   1
4. D
   2

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1. A
   -1
2. B
   0
3. C
   1
4. D
   2

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1. A
   -1
2. B
   0
3. C
   1
4. D
   2

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

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