question_answer

A vector \[{{\overrightarrow{F}}_{1}}\]is along the positive X-axis. If its  vector product with another vector \[{{\overrightarrow{F}}_{2}}\]is zero then \[{{\overrightarrow{F}}_{2}}\] could be                                                                 [MP PMT 1987]

A)                 \[4\hat{j}\]        

B)                 \[-(\hat{i}+\hat{j})\]

C)                 \[(\hat{j}+\hat{k})\]      

D)                 \[(-4\hat{i})\]