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Q.

The number of lines perpendicular to Y -axis lying in XZ plane and passing through the origin is

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a

2

b

3

c

Infinite

d

1

answer is D.

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Detailed Solution

The no of lines ⊥  ler to y axis lying in the xz plane are infinite and they are parallal.  hence  there will be only line ⊥  lir to the y – axis and passing through the origin

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