1.

Assertion (A) : P(3,4,5), Q(-1,7,9) are two given points, length of projection of PQ on xyplane is 5 units Reason ( R ): The projection of (x_(1),y_(1),z_(1)) " onXY PLANEis (x_(1),y_(1),0)

Answer»

Both A and R are true and R is the CORECT explanation of A
Both A and R are tru and R is not the CORRECT explanation of A
a is true but Ris false
A is false but R is true

Answer :A


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