The correct answer is option 4: Yes, but he has to become a Member of Parliament within six months of his appointment. This means that a person who is not currently a Member of Parliament can be appointed as a minister, but they must become a Member of Parliament within six months of their appointment. This allows for flexibility in the selection of ministers and the possibility for individuals outside of Parliament to be appointed based on their expertise or qualifications. However, it is important for them to become a Member of Parliament within six months to ensure that they have the necessary understanding of parliamentary proceedings and can effectively carry out their role as a minister.