If the pins of the keyboard are used as an interrupt, then these pins will cause interrupt of what type?

If the pins of the keyboard are used as an interrupt, then these pins

1.	If the pins of the keyboard are used as an interrupt, then these pins will cause interrupt of what type?
A.	External hardware interrupt
B.	Timer interrupt
C.	TI/RI interrupt
D.	None of the mentioned
Answer» B. Timer interrupt