A) \[60\]
B) \[32\]
C) \[4\]
D) \[64\]
Correct Answer: A
Solution :
Number of possible elements \[=2[{{1}^{2}}+{{2}^{2}}+{{3}^{2}}+{{4}^{2}}]\] \[=2(1+4+9+16)=60\]
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