1. A
   I only
2. B
   II only
3. C
   Both I and II
4. D
   Neither I nor II

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1. A
   v
2. B
   $v^2-1$
3. C
   $v^2$
4. D
   $v^2+1$

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1. A
   2
2. B
   1
3. C
   0.5
4. D
   0.25

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1. A
   9725
2. B
   6971
3. C
   6726
4. D
   6725

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1. A
   1
2. B
   2
3. C
   $0<uv<1$
4. D
   $1<uv<2$

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1. A
   30°
2. B
   45°
3. C
   60°
4. D
   90°

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1. A
   30°
2. B
   45°
3. C
   60°
4. D
   90°

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1. A
   I only
2. B
   II only
3. C
   Both I and II
4. D
   Neither I nor II

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

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1. A
   $1-x=y+2=3-z$
2. B
   $-(x+1)=y-2=z+3$
3. C
   $3x+3=2y-4=6z+18$
4. D
   $3x-3=2y+4=6z-18$

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1. A
   $\langle-3,2,1\rangle$
2. B
   $\langle3,2,-6\rangle$
3. C
   $\langle1,3,2\rangle$
4. D
   $\langle2,2,-10\rangle$

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1. A
   on a straight line
2. B
   on a circle
3. C
   on a parabola
4. D
   the vertices of a triangle

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

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1. A
   2 only
2. B
   5 only
3. C
   2, 17
4. D
   5, 17

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1. A
   $3\sqrt{10}$
2. B
   $5\sqrt{10}$
3. C
   $3\sqrt{12}$
4. D
   $5\sqrt{12}$

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