Two circuits $(a)$ and $(b)$ have charged capacitors with capacitances and charges as shown in the figures. The switches are initially open. On closing the switches, what happens to the charge flow?

• A
  No charge flows in $(a)$ but charge flows from $R$ to $L$ in $(b)$
• B
  Charges flow from $L$ to $R$ in both $(a)$ and $(b)$
• C
  Charges flow from $R$ to $L$ in $(a)$ and from $L$ to $R$ in $(b)$
• D
  No charge flows in $(a)$ but charge flows from $L$ to $R$ in $(b)$