A transistor is operated in common emitter configuration at constant collector voltage $V_c = 1.5 V$ such that a change in the base current from 100 µA to 150 µA produces a change in the collector current from 5 mA to 10 mA. The current gain $\beta$ is:-

Question

( A ) 75
( B ) 50
( C ) 100
( D ) 67