In the following sentence improvement question, the underlined part is All the family members of his: All the family members of his are in Ernakulam. Choose the best replacement, or select No improvement if the phrase is already correct.

Introduction / Context:
This question tests your ability to recognise and correct redundancy in English noun phrases. The sentence given is All the family members of his are in Ernakulam, with All the family members of his underlined. The phrase is somewhat clumsy and repetitive, because of his already indicates possession. There are simpler and more natural ways to say the same thing in English, and the options offer several corrected structures.

Given Data / Assumptions:

• Sentence: All the family members of his are in Ernakulam.
• Underlined phrase: All the family members of his.
• Options: All the members of his family, All his family members, All of his family members, No improvement, All family members of him.
• Meaning: Every member of his family is in Ernakulam.

Concept / Approach:
In English, we generally avoid redundant constructions like family members of his when a more compact possessive phrase is available. The most natural patterns are All his family members or All the members of his family. Both are grammatically correct, but All his family members is shorter and more idiomatic. The option All of his family members is also acceptable but slightly wordier. The phrase of his is sometimes used after indefinite pronouns (a friend of his), but with all and a clear noun, his family members reads much better.

Step-by-Step Solution:

Verification / Alternative check:
Compare the improved sentence All his family members are in Ernakulam with the original. Both clearly state that every member of his family is located in Ernakulam. However, the improved version is smoother and avoids the awkward of his after a full noun phrase. All the members of his family are in Ernakulam would also be acceptable, but exams usually prefer the shorter, more direct All his family members are in Ernakulam when such an option is available.

Why Other Options Are Wrong:
Option A (All the members of his family) is grammatically correct and quite natural, but Option B is even more concise, and exam keys often select the neatest form when multiple correct answers exist. Option C (All of his family members) is also acceptable, but the word of is unnecessary; All his family members is simpler. Option D (No improvement) is not ideal because the original phrase All the family members of his is verbose and slightly awkward. Option E (All family members of him) is incorrect; of him is not a natural possessive structure with family members in this context.

Common Pitfalls:
Students often get used to patterns like a friend of his and then overextend them, creating of his structures even when they are not needed. Another pitfall is assuming that if a phrase is grammatically legal, it cannot be improved stylistically. Sentence improvement questions frequently target redundancy and unnatural phrasing rather than outright errors. To do well, you should look for the option that is not only correct but also the most natural and concise.

Final Answer:
The best improvement is All his family members, giving: All his family members are in Ernakulam.