Question: A main program calls a Power procedure using the instruction: BL Power. That instruction is at address 4 0 0 4 . What happens to

A main program calls a Power procedure using the instruction:
BL Power.
That instruction is at address 4004.
What happens to LR?
LR is set to 4004
LR is set to 4000
LR is unchanged
LR is set to 4008
A main program calls a Power procedure using the instruction: BL

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