How many brother does A have?I. A, who is B's brother, has

How many brother does A have?
I. A, who is B's brother, has two siblings.
II. D is brother of A and is youngest in the family.

1. if the data in Statement I alone are sufficient to answer the question, while the data in Statement II alone are not sufficient to answer the question.
2. if the data in Statements II alone are sufficient to answer the question, while the data in Statement I alone are not sufficient to answer the question.
3. if the data either in Statement I alone or in Statement II alone are sufficient to answer the question.
4. if the data in both the Statement I and II together are not sufficient to answer the question.
5. if the data in both the Statement I and II together are necessary to answer the question.

Even by using both the statements together we cannot determine the gender of B. So, A can have one or two brothers.