Direction: In the following questions, part of the sentence is in bold. Below are given alternatives to the bold part at 1, 2, and 3 which may improve the sentence. Choose the correct alternative. In case no improvement is needed, your answer is '4'.
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I love him because he is a good man by heart.
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- at heart
- of heart
- in heart
- No improvement
Correct Option: A
at heart is an idiomatic expression which is the correct expression.
Hence, at heart is the right usage.