Correct Option: B

The equivalent h-parameter model of a common emitter amplifier with emitter resistance Re is given by: (i.e., fig-1)
however the approximate h-parameter model is given by (i.e., fig-2)
From above figure the approximate value of input impedance.

Ri =	Vi
	ib

Applying KVL in the input loop, we get
V_i – h_ie i_b – i _e R_e = 0
or Vi/ – h_ie i_b – (i _b + i _c) R_e = 0
or V_i – h_ie i_b – (i _b + h_fei_b) R_e = 0 or V_i = [h_ie + (1 + h_fe) R_e] i _b

or =	Vi	= Ri = hie + (1 + hfe) Re
	ib

Hence alternative (B) is the correct choice.