$1+\frac{1}{4} + \frac{1.3}{4.8} + \frac{1.3.5}{4.8.12} + ...$ is equal to :

Question

( A ) $\sqrt{2}$
( B ) $\frac{1}{\sqrt{2}}$
( C ) $\sqrt{3}$
( D ) $\frac{1}{\sqrt{3}}$