The vectors \( \lambda \hat{i}+\hat{j}+2 \hat{k}, \hat{i}+\lambda \...

The vectors \( \lambda \hat{i}+\hat{j}+2 \hat{k}, \hat{i}+\lambda \hat{j}-\hat{k} \) and \( 2 \hat{i}-\hat{j}+\lambda \hat{k} \) are coplanar if
(A) \( \lambda=-2 \)
(B) \( \lambda=0 \)
(C) \( \lambda=1 \)
(D) \( \lambda=-1 \)
P
WV