The value of Z in figure which is most appropriate to cause

The value of Z in figure which is most appropriate to cause parallel resonance at 500 Hz is—

The given circuit:

f_r =	1	=	1	= 500
	2π LC		2π 2 × C

or	1	= 25 × 10⁴
	4π² 2C

C =	1	=	100 × 10^–6
	8π² × 25 × 10⁴		1971·92

or
C = 0·0507 µF
or
C ≈ 0·05 µF
Hence alternative (D) is the correct choice.