Error Spotting – Choose the part (A–D) that contains the grammatical error, or choose No error if the sentence is fully correct. Sentence (parts correspond to options below): A) Even after requesting B) him, he did not C) tell us that how D) he solved the problem

Introduction / Context:
The item targets clause structure after reporting verbs and the incompatibility of that with wh-words in the same slot. In an embedded wh-clause (how, why, where), the complementizer that is not used before the wh-word.

Given Data / Assumptions:

• Reporting frame: tell us …
• Wh-word: how
• Added complementizer: that

Concept / Approach:
After verbs like tell, say, or explain, we use either a that-clause (tell us that he solved it) or a wh-clause (tell us how he solved it), but not both together. Therefore, that how is incorrect; the correct structure is tell us how …

Step-by-Step Solution:

Verification / Alternative check:
Compare minimal pairs: He told us that he solved it (that-clause) vs He told us how he solved it (wh-clause). Mixing them is ungrammatical.

Why Other Options Are Wrong:

• A) Even after requesting … is an acceptable concessive preface (understood object is him).
• B) Pronoun reference he and negation did not are fine.
• D) Past form solved is correct and idiomatic.

Common Pitfalls:
Writers often overinsert that before wh-clauses. Choose one complementizer pattern only.

Final Answer:
Option C contains the error. Use tell us how he solved the problem.