Statement:
Many cotton farmers are committing suicide due to lack of rains.
Assumptions:
I. Other farmers are not committing suicide.
II. Cotton is dependent on rain.
Answer: B
The statement is talking about only cotton farmers. In this context anything said about any other farmer cannot be considered as an assumption. Hence, (I) is not an assumption. (II) is a definite assumption because an evident relationship is established between cotton and the lack of rains.