A logic probe is again applied to the pins of a 7421 IC with the following results. Is there a problem with the circuit and if so, what is the problem?

A logic probe is again applied to the pins of a 7421 IC with the follo

1.	A logic probe is again applied to the pins of a 7421 IC with the following results. Is there a problem with the circuit and if so, what is the problem?
A.	Pin 6 should be ON.
B.	Pin 8 should be ON.
C.	Pin 8 should be pulsing.
D.	no problem
Answer» E.