Select the sentence that is grammatically correct:

The correct answer is Option (4) → After three years in the hostel, Ishaan is used to washing his own clothes.

“Be used to” + -ing:

• Is used to means “is in the habit of”. Here the “to” is followed by an -ing word: is used to washing.

Why the Other Options are Incorrect?

Option 1: The heavy rain prevented us to go for our evening walk in the park. — Incorrect. “Prevent” is followed by a person + “from” + -ing, not by “to” + verb.
Corrected: The heavy rain prevented us from going for our evening walk in the park.

Option 2: Our coach advices us to warm up properly before every practice match. — Incorrect. “Advice” is a noun. The verb is “advise”.
Corrected: Our coach advises us to warm up properly before every practice match.

Option 3: The tourists stopped at every bend to take photos of the beautiful sceneries of Munnar. — Incorrect. “Scenery” has no plural form. It is always used as a singular noun.
Corrected: The tourists stopped at every bend to take photos of the beautiful scenery of Munnar.