The work done in placing a charge of $8 \times 10^{-18} C$ on a condenser of capacity $100 \mu F$ is :

Question

( A ) $4 \times 10^{-10}J$
( B ) $3.1 \times 10^{-26}J$
( C ) $32 \times 10^{-32}J$
( D ) $16 \times 10^{-32}J$