Select the most appropriate option that can substitute the underlined segment in the given sentence. If no substitution is required, select ‘No substitution’. Satya is always great to his friends who helped him when he was in trouble.

Correct — A. The trigger is the relative clause who helped him when he was in trouble. It supplies a reason for thanks, so the adjective in the main clause has to name that response.

Grateful means feeling or showing thanks, and it takes to before a person — grateful to his friends. That is the exact frame the sentence prints.

Great to someone is possible English, but it means kind or generous towards them, and then the help clause explains nothing. Option (a) is the substitution the sentence needs.

Why the others are wrong

• (b)
  no substitution — Keeping great to leaves a sentence that is grammatical but pointless: the friends' help then has nothing to do with the adjective, and the cause-and-response link collapses.
• (c)
  thanked — Thanked would make the clause passive — is always thanked — and thank takes no to before the person. Satya is the one giving thanks here, not receiving them.
• (d)
  greatful — Greatful is not an English word. It is the standard misspelling, made by writing the spelling of great with the sense of grateful.

A substitution item asks you to repair one segment while everything around it stays fixed, so the untouched words are your evidence.

Two of them settle this. The frame is is ___ to his friends, so the gap wants a word that can follow is and then take to before a person — an adjective.

Grateful to satisfies both, and the relative clause supplies the reason gratitude needs. Great passes the grammar test and fails the meaning test, which is why the item bothers to offer a no-substitution option.

Key facts

• Grateful means feeling or showing thanks, and takes to before the person thanked.
• Grateful comes from Latin gratus, pleasing or thankful, and shares that root with gratitude.
• Greatful is a misspelling and is not a word in standard English.
• Thank takes a direct object — you thank someone, never thank to someone — which is what rules out thanked here.

Common traps

• Choosing no substitution because great to his friends is grammatical on its own.
• Picking greatful without reading it letter by letter, since it sounds identical to grateful.
• Treating the relative clause as decoration instead of as the clue that names the required sense.

No directly related past PYQ was found.