Figure shows the transfer characteristics of a base biased CE transistor. Which of the following statements are not true? 
(A) At $V_i$ = 0.4 V, transistor is in active state. 
(B) At $V_i$ = l V, it Can be used as an amplifier 
(C) At $V_i$ = 0.5V, it can be used switch turned off 
(D) At $V_i$ = 2.5V, it can be used as a switch turned on.