Explanation:

- Let's break down the clues step by step:

- "Only two persons have less weight than E."

? E is third lightest.

- "C has less weight than B but more than A."

? Order: A < C < B

- "B has a weight less than only two persons."

? B is third heaviest.

- "D has less weight than F."

? D < F

- Arrange top to bottom (heaviest to lightest):

Since only two lighter than E, E is fourth in line. B is third heaviest.

A < C < B.

D < F (so F heavier than D).

Top ranks have to be filled, with B as 3rd heaviest, E as 4th.

The only way to satisfy all is: F > D > B > E > C > A.

- Highest weight is F.

Correct answer:

Option:3, F