If `3.01 xx 10^20` molecules are removed from 98 mg of `H_(2)SO_(4)` , then number of moles of `H_(2)SO_(4)` left are

Options

A. `0.5 xx 10^(-3)` mol
B. `0.1 xx 10^(-3)` mol
C. `9.95 xx 10^(-2)` mol
D. `1.66 xx 10^(-3)` mol

Answer

A