1.

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.                 \[(-4\hat{i})\]
Answer» E.


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