1.

There are three planes prod_(1),prod_(2),prod_(3) such that prod_(1) is perpendicular to prod_(2) and prod_(1) is parallel to prod_(3). If n_(1),n_(2),n_(3) are the nomals to the planes prod_(1),prod_(2),prod_(3) respectively then

Answer»

`n_(1),n_(2), and n_(3)` are PARALLEL
`n_(1)` is parallel to `n_(3)andn_(1)` is PERPENDICULAR to `n_(2)`
`n_(1),n_(2),n_(3)` are mutually perpendicular
`n_(1),n_(2)` are parallel to X -axis and `n_(3)` is parallel to Z-axis

ANSWER :B


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