In the given sentence, find out which part has an error. The letter of that part will be your answer. If there is no error, mark (d) as your answer.
\[
\text{She is a brilliant teacher (a)/ but of her three children (b)/ neither has any merit. (c)/ No error. (d)}
\]
Show Hint
Pay attention to the correct usage of prepositions and conjunctions in sentences to avoid grammatical errors.
The correct sentence should be "but her three children." The word "of" is incorrect in this context, and thus part (a) contains the error.
Final Answer:
\[
\boxed{a}
\]