A) 54
B) 64
C) 74
D) 84
Correct Answer: D
Solution :
\[{{n}_{1}}{{\lambda }_{1}}={{n}_{2}}{{\lambda }_{2}}\]\[\Rightarrow 62\times 5893={{n}_{2}}\times 4358\]\[\Rightarrow {{n}_{2}}=84.\]
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