Given : $$\log2=0.30103$$
Let $$x=2^{56}$$
=> $$\log(x)=\log(2^{56})$$
=> $$\log(x)=56\log(2)$$
=> $$\log(x)=56\times0.30103=16.85$$
If characteristic is 16, then number of digits in $$2^{56}$$ is 17
=> Ans - (C)
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