Which of the following sentences contains an adjective clause?

The correct answer is Option (3) → In Darjeeling, we stayed at a homestay whose owner grows his own tea.

An adjective is a word that describes a noun or a pronoun, for example a tall tree, the food is tasty.

Adjective clause:

A clause is a group of words with its own subject and verb. An adjective clause describes a noun just before it. Here “whose owner grows his own tea” has its own subject (owner) and verb (grows). It describes “a homestay”, so it is an adjective clause.

Why the Other Options are Incorrect?

Option 1: Ma asked me where I had kept the spare keys. — Incorrect. “Where I had kept the spare keys” is a noun clause. It tells what Ma asked.

Option 2: The shopkeeper pulled down the shutter because it had started to hail. — Incorrect. “Because it had started to hail” is an adverb clause. It tells why the shopkeeper pulled down the shutter.

Option 4: A basket full of ripe jamuns was left on our doorstep. — Incorrect. “Full of ripe jamuns” has no verb, so it is not a clause. It is an adjective phrase.