Dielectrics question from MHT CET 2023 (14 May, Shift 2)

Answer: (c)

1. The area is split into two halves, each filling the full gap, so they are in parallel.
2. Each half with air: $5\ \mu\text{F}$; with dielectrics: $2 \times 5 = 10\ \mu\text{F}$ and $4 \times 5 = 20\ \mu\text{F}$.
3. $C = 10 + 20 = 30\ \mu\text{F}$.
4. So the answer is (c) $30\ \mu\text{F}$.