A weekly dinner schedule (Mon-Fri) uses 5 cuisines: Thai, Indian, Mexican, Japanese, Italian. Thai is on Monday or Tuesday. Italian is on Friday. Indian is not on a day adjacent to Mexican. Japanese is on Wednesday. If Thai is on Tuesday, which is valid?

✓ Correct Answer: Option B

Thai=Tue, Japanese=Wed, Italian=Fri. Remaining: Indian and Mexican for Mon and Thu. Indian not adjacent to Mexican. A: Mexican=Mon, Indian=Thu — adj check: Mex(1) and Indian(4) not adjacent ✓. But wait, are there other adjacencies? Indian(Thu=4) adj to Japanese(Wed=3) and Italian(Fri=5) — fine, constraint is only Indian not adj to Mexican. A works. B: Indian=Mon, Mexican=Thu — Indian(1) adj to Thai(2), Mexican(4) adj to Japanese(3) and Italian(5). Indian and Mexican: Mon(1) and Thu(4) not adjacent ✓. B works. Both valid.