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Consider the planes p (1) : 2x + y+ z+4=...

Consider the planes `p _(1) : 2x + y+ z+4=0`
`p _(2) :y -z+4 =0 and p _(3) : 3x+ 2y +z+8=0`
Let `L_(1),I _(2), I_(3)` be the lines of intersection of the planes `P_(2)and P_(3), P_(3) and P _(1),P_(1) and P _(2) ` respectively. Then:

A

at least two of the lines `L_(1),L_(2)and L_(3)` ar non-parallel

B

at least two of the lines `L_(1), L_(2) and L _(3)` are parallel

C

the three planes intersect in a line

D

the three planes for a trianqular prism

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The correct Answer is:
B, C
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