Combination of Capacitors question from MHT CET 2023 (12 May, Shift 1)

Answer: (b)

1. $C_5$ and $C_6$ are in parallel: $4 + 4 = 8\ \mu\text{F}$; in series with $C_2$: $\frac{8\times 8}{16} = 4\ \mu\text{F}$.
2. $C_3$ and $C_4$ in series: $4\ \mu\text{F}$.
3. These two $4\ \mu\text{F}$ branches are in parallel: $8\ \mu\text{F}$.
4. In series with $C_1$: $C_{AB} = \frac{8\times 8}{16} = 4\ \mu\text{F}$.
5. So the answer is (b) 4 $\mu$F.