Study the following information carefully to answer the questions given below.

Seven team members (P, Q, R, S, T, U, and V) present their annual project reports (Alpha, Beta, Gamma, Delta, Epsilon, Zeta, and Eta) in seven different months of the same year, namely, January, April, May, June, August, September, and October. All the information is not necessarily in the same order.

The member presenting in April works on Gamma. S, who works on Alpha, presents in June. P presents immediately before S. T presents in the month having 31 days which comes after June, but not in October. The one working on Epsilon presents in the same month as T. Q presents in January and works on Beta. R presents in the month having 30 days which comes after August. The number of members presenting before P is one more than the number of members presenting after R. There are four members presenting between Q and the one who works on Zeta. U presents in October. The one who works on Eta presents in October.

Which of the following members works on Zeta?

The correct option is R.

Let's analyze the given information step-by-step to determine the month, team member, and project report assigned to each person.

1. Given Months and Days:
- January (31 days)
- April (30 days)
- May (31 days)
- June (30 days)
- August (31 days)
- September (30 days)
- October (31 days)

2. Direct Clues and Step-by-Step Arrangement:
- Q presents in January and works on Beta.
- The member presenting in April works on Gamma.
- S works on Alpha and presents in June.
- P presents immediately before S. Since S presents in June, P presents in May.
- U presents in October, and the member presenting in October works on Eta.
- T presents in a month with 31 days after June, but not in October. The only such month is August (31 days).
- The one working on Epsilon presents in the same month as T, so August corresponds to Epsilon.
- R presents in a month with 30 days after August, which must be September (30 days).
- "There are four members presenting between Q and the one who works on Zeta." Since Q presents in January (1st month), 4 members (April, May, June, August) present between January and September. Thus, the member presenting in September works on Zeta.
- Since R presents in September, R works on Zeta.
- The remaining project Delta must be presented by P in May, and the remaining member V presents in April.

Final Schedule Table:
- January: Q (Beta)
- April: V (Gamma)
- May: P (Delta)
- June: S (Alpha)
- August: T (Epsilon)
- September: R (Zeta)
- October: U (Eta)

Therefore, the member who works on Zeta is R.