8-10A3 B
In the circuit shown in Fig. 8A6, which of the following is true?
A. With A and B high, Q1 is saturated and Q2 is off.
B. With either A or B low, Q1 is saturated and Q2 is off.
C. With A and B low, Q2 is on and Q4  is off.
D. With either A or B low, Q1 is off and Q2 is on.
