Three capacitors each of capacity 4µF are to be connected

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Three capacitors each of capacity 4µF are to be connected in such a way that the effective capacitance is 6 µF. This can be done by

1. connecting two in parallel and one in series
2. connecting all of them in series
3. connecting them in parallel
4. connecting two in series and one in parallel

Correct Option: D

For series, C' =	C₁ × C₂	=	4 × 4	= 2μF
	C₁ + C₂		4 + 4

For parallel, C_eq = C' + C₃ = 2 - 4 = 6μF