VectorMedium
Question
The values of a, for which the points A, B, C with position vectors 
and 
respectively are the vertices of a right angled triangle with C = 
are -
and respectively are the vertices of a right angled triangle with C = are -Options
A.-2 and 1
B.2 and -1
C.2 and 1
D.-2 and -1
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