A) \[{{a}_{1}}{{b}_{2}}-{{b}_{1}}{{a}_{2}}=0\]
B) \[{{a}_{1}}{{a}_{2}}+{{b}_{1}}{{b}_{2}}=0\]
C) \[a_{1}^{2}{{b}_{2}}+b_{1}^{2}{{a}_{2}}=0\]
D) \[{{a}_{1}}{{b}_{1}}+{{a}_{2}}{{b}_{2}}=0\]
Correct Answer: B
Solution :
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