In the question two statements are given each followed by two conclusions, I and II. You have to consider the statements to be true even if they seem to be at variance from commonly known facts. You have to decide which of the given conclusions, if any, follows from the given statements.
Statement:
1. Some clerks are poor;
2. A is poor.
Conclusion:
I. A is clerk
II. A has a large family.

The basic diagram for the given statements is

I. A is clerk

From the basic diagram, A is not clerk. Hence conclusion I do not follow.

II. A has a large family

There is no particular information about A's family, so we cannot that his family is large. Hence conclusion II do not follow.

$$\therefore\ $$Neither Conclusion I nor Conclusion II follows the given statements

Hence, the correct answer is Option D