We are given several clues to solve this puzzle:
1. The winner got 90 marks.
2. Akhila got 13 in Coherence and Divya got 10 in Machinery.
3. Bhanu’s total was less than Akhila’s.
4. Charulata has sent an entry.
5. Ela had as many marks as Divya, and none got 20 under any head.
From these clues, we know:
- Akhila must have scored fewer marks than Bhanu, because Bhanu’s total is less than Akhila’s.
- Divya has 10 marks in Machinery, and Ela has as many marks as Divya, so they both have 10 marks in Machinery.
- Bhanu must have scored the highest to win, and considering all the constraints, Bhanu had the highest total score among the five participants. Thus, the correct answer is (D).