question_answer

If \[\mathbf{A}\left( \mathbf{l},\mathbf{2} \right),\mathbf{B}\left( \mathbf{4},\mathbf{6} \right),\mathbf{C}\left( \mathbf{5},\mathbf{7} \right)\]and \[\mathbf{D}\left( \mathbf{a},\mathbf{b} \right)\]are the vertices of parallelogram ABCD then

A) (a) \[a=2,b=3\]           

B) (b) \[a=2,b=4\]

C) (c) \[a=3,b=4\]        

D) (d) \[a=3,b=5\]