Correct Answer: C
Explanation:
The four seating conditions listed allow us to make the following inferences:
- Inference 1 ---- because of conditions 2 and 4, we infer that B, F, and H, being engineers as well as chemists, must not sit next to the other
- Inference 2 ---- because of condition 3 and 4 we infer that A, C, D and G, being engineers as well as physicists must not sit next to the other.
- Inference 3 ---- conditions 1, 2 and 3 allow us to infer that there are no restrictions on where E can sit.
From inference 2, it is clear that no combination that involves either C, D or G is possible. H and E may each sit next to A.