Step 1: Read the question carefully.
Match each Article with its subject, then pick the one that deals with removing a state government.
Step 2: Recall what the textbook says.
Emergency related Articles: 352 national emergency, 356 state emergency (President's Rule), 358 and 359 effect on fundamental rights, 360 financial emergency. Kerala 1959 is the first big case of Article 356.
Step 3: Test option 1 against that fact.
358 is about fundamental rights during an emergency. It cannot dismiss a ministry. This does not match, so we reject option 1.
Step 4: Test option 2 against that fact.
360 is about financial emergency, and there was no such emergency in 1959. This does not match, so we reject option 2.
Step 5: Test option 3 against that fact.
357 only explains what Parliament may do after 356 is applied. The dismissal itself is not under 357. This does not match, so we reject option 3.
Step 6: Test option 4 against that fact.
356 is President's Rule in a state. This is exactly what was applied to Kerala. This matches, so option 4 is the answer.
Step 7: Confirm by elimination.
Articles 358, 360 and 357 relate to other matters, so only 356 fits.
Final Answer:
The Article used was 356, so the answer is option 4.
\[ \boxed{\text{Option 4}} \]