a capacitor of capacitance `C` is connected to two voltmeter `A` and `B`. `A` is ideal , having infinite resistance, while `B` has resistance `R`. The capcitor is charged and then switch `S` is closed. The reading of `A` and `B` will be equal
A. at all times
B. after time RC
C. after time `RC 1n 2`
D. only after a very long time