Correct option is B
✔️ Option (b)
The children’s behaviour alienated their mother has the correct spelling.
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Correct spelling:
Alienated – To make someone feel isolated or estranged.
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Hindi meaning: अलग-थलग कर देना, पराया बना देना
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Example: His rude behaviour alienated his friends.
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Meanings of all the other options:
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(a) aleinated – ❌ Spelling error; should be “alienated”.
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(c) alnieate – ❌ Spelling error; incorrect arrangement of letters.
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(d) alianeted – ❌ Spelling error; incorrect vowel use.