True or False

1. The set of odd integers between 2 and 4 is not a singleton set?
2. The set of rational numbers between 1 and 3 is infinite?
3. A-B = { x / x A V x B }?
4. If A and B are disjoint sets then A-B = A?
5. A conjunction is considered to be true only if one of the component is true?
6. Both the components being false, the composite proposition is false?