If we add 1 in the numerator of a fraction and subtract 1 from its denominator, the fraction becomes 1, It is also given that the fraction becomes 1/2 when we add 1 to its denominator, and then what is the fraction.

Question

( A ) \large\frac{2}{5}
( B ) \large\frac{3}{7}
( C ) \large\frac{3}{5}
( D ) \large\frac{4}{5}