Correct Answer - Option 2 : B
Six people A, B, C, D, E and F participated in the debate.
i) Two of the six were women.
ii) E and his unmarried sister were the new members in this year's debate, D's husband who was the winner of the previous year and participating in this year's debate.
iii) A and C were last year's runners-up, this year's winner is neither previous year's winner, nor new member
iv) B has left the debate midway due to unavoidable reason
v) C at the end of the debate got more marks than A but less than E and F.
F > E > C > A
From the option, E is the new member.
'A' and 'C' were the runners-up of the previous year, Hence cannot be the husband of D as husband of 'D' was the winner of previous year. Thus 'B' is the husband of 'D'.
As 'D' husband was the previous year winner. It is clear that winner for last year is 'B'.
Hence, the correct answer is "B".