Correct Option: C

Given that g_m = 3 × 10^{– 3}
R_S = 3 k
R₀ =?
R₀ is the common drain configuration is given as,

R0 = RS ||	1
	gm

or R0 = 3000 ||	1
	3 × 10–3

or R0 =	3000 × (1000 / 3)
	3000 + (1000 / 3)

or R₀ = 300 Ω
Hence alternative (C) is the correct answer.