In a triangle ABC , right angled at the ...

In a triangle ABC , right angled at the vertex A , if the position vectors of A , B and C are respectively `3 hati + hatj-hatk , -hati + 3hatj + phatk` and `5 hati + q hatj - 4 hatk` , then the point (p,q) lies on a line

A

making an obtuse angle with the positive direction of x-axis

B

parallel to x-axis

C

parallel to y-axis

D

making an acute angle with the positive direction of x-axis

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The correct Answer is:

D

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