In 8086, which instruction at the end of a sub-routine takes the

| In 8086, which instruction at the end of a sub-routine takes the execution back to the main program?

A. JMP

B. END

C. CALL

D. RET

Please scroll down to see the correct answer and solution guide.

When we call any subroutine during the execution of the main program then the address of next instruction is stored in a stack
After we complete the execution of the subroutine, then the program will have to return to the original program.
So, it pops the address that is stored in a stack during the execution of the call and assigned to the program counter PC.
The RET (Return) instruction is also equivalent to POP instruction. Hence it will take 3 machine Cycles (Opcode fetch, Read operation, Read operation)

Opcode	Operand	Explanation	Example
CALL	Address	Calls a subroutine and saves the return address on the stack.	CALL 2050
RET	None	Returns from the subroutine to the main program	RET
JUMP	Address	Transfer the control of execution to the specified address	JUMP 2050
LOOP	Address	Loops through a sequence of instruction until Cx = 0	LOOP 2050
END	none	Marks the termination point of the program	END