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

Answer: (d)

1. The top wire joins A to the right plate of the last capacitor, and B is at the junction before it.
2. So the last $C$ is directly between A and B.
3. The other three $C$ form a series chain from A to B: $\frac{C}{3}$.
4. $C_{AB} = C + \frac{C}{3} = \frac{4C}{3}$
5. So the answer is (d) $\frac{4C}{3}$.