Correct Answer - Option 3 : D
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
Now,
As mentioned in the statement 3, A and C were last year's runners-up, this year's winner is neither previous year's winner, nor new member. Thus E and his unmarried sister were the new members in this year's debate so they cannot be the winner. A and C also cannot be the winner as they were last year's runner up.
'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 'B' was the winner of previous year so he cannot be the winner this time. Thus 'B' also ruled out.
A.T.Q
Thus winner will be either E or D. As E is not mentioned in the option, clearly the winner will be D.
Hence, the correct answer is "D".