Combination of Capacitors question from MHT CET 2025 (5 May, Shift 2)

Answer: (c)

1. $2\ \mu\text{F}$ and $4\ \mu\text{F}$ in parallel: $6\ \mu\text{F}$, in series with the other $4\ \mu\text{F}$.
2. $C_{eq} = \frac{4\times6}{10} = 2.4\ \mu\text{F}$, $Q = 2.4\times9 = 21.6\ \mu\text{C}$.
3. Series $4\ \mu\text{F}$: $V = \frac{21.6}{4} = 5.4\ \text{V}$ (the parallel pair has $3.6\ \text{V}$).
4. So the answer is (c) $5.4\ \text{V}$.