1. Program Counter (PC) Pushed to Stack
2. Generate LCALL to ISR
3. Complete Execution of instruction in progress
4. Clear the interrupt flag
5. Set interrupt in progress
Correct order of execution of action taken by 8051 micro-controllers when an interrupt occurs:

A. 3, 1, 4, 5, 2

B. 1, 2, 4, 5, 3

C. 3, 4, 2, 5, 1

D. 1, 3, 2, 4, 5

Answer: Option A