AIIMS 2017 Physics Capacitors MCQ Question

Option C is correct because it correctly calculates the energy stored in a capacitor with an equivalent capacitance $C_{eq} = 3C$ when connected in parallel, leading to the expression $U = \frac{1}{2} (3C) V^2 = \frac{3}{2} CV^2$. Option A is misleading because it does not account for the correct equivalent capacitance when capacitors are in parallel. Option B incorrectly states the equivalent capacitance without proper context, as it should clarify that the capacitors are connected in parallel. Understanding these relationships is essential for analyzing circuits involving capacitors.