Q. Under the same fact situation as above, suppose that the following restrictions hold good: A) A can be included provided C is included. B) E is included provided B or G is included but not both. C) C can be included provided at least D or F is excluded. Which one of the following is a certainty ?

1. A, B, C, & E
2. A, C, D & F
3. B, C, D & E
4. A,B,C&F