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The return address of the Sub-routine is pointed to by _______

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The return address of the Sub-routine is pointed to by _______

(a) IR

(b) PC

(c) MAR

(d) Special memory registers

The question was asked during an internship interview.

This is a very interesting question from Subroutines and Nesting topic in chapter Machine Instructions and Programs of Computer Architecture

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Correct answer is (b) PC

For explanation I would say: The return address from the subroutine is pointed to by the PC.

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