The correct answer is '(b)'. Key Points - The error lies in Part (b) of the sentence. - Since 'though' as subordinating conjunction implies or introduces a contrasting idea and 'but' as coordinating conjunction contrasts an idea. - Both may go against the understanding that they negate each idea. - Therefore, though and but are not used together if a comma (,, is present after the subordinate clause. - Therefore, the use of 'but'in Part (b) of the sentence should be removed to make it grammatically correct. - Therefore, the correct answer is '(b)'. Correct sentence:Though he is poor, he is honest.
