Let S, N, V, and M represent the ages of Shyam, Nath, Varun, and Muneer, respectively. Statement A: M>V and V>S, V>N. This implies Varun is older than Shyam and Nath, and Muneer is older than Varun: M>V>(S, N). The order between S and N is unknown; therefore, the youngest cannot be determined. Statement B: M is the oldest. This means M >V, M>S, M>N. This does not help determine the youngest. Statement C: S>N. Shyam is older than Nath. Combining A and B: M>V>(S, N). B confirms M is the oldest, already implied by A. The order of S and N remains unknown. The youngest could be S or N. Combining B and C: M is oldest (M>S, M>N, M>V) and S>N. The position of V relative to S and N is unknown; thus, the youngest could be N or V. Combining A and C: From A, M>V>S and M>V>N. From C, S>N. Therefore, M>V>S>N. Nath (N) is the youngest. Statements A and C together are sufficient to determine the youngest, matching option (4).