question_answer

The value of P so that the vectors \[2\overset{\hat{\ }}{\mathop{i}}\,-\overset{\hat{\ }}{\mathop{j}}\,+\overset{\hat{\ }}{\mathop{k}}\,,\]\[\overset{\hat{\ }}{\mathop{i}}\,+\overset{\hat{\ }}{\mathop{2j}}\,-\overset{\hat{\ }}{\mathop{3k}}\,,\]and \[3\overset{\hat{\ }}{\mathop{i}}\,+\overset{\hat{\ }}{\mathop{pj}}\,+\overset{\hat{\ }}{\mathop{5k}}\,,\] are coplanar should be

A)  16                                         

B)  -4

C)  4                                            

D)  -8