Define an RP-tree by the parent-child adjacency lists as follows:(i) Root B: J, H, K; (ii) H: P, Q, R; (iii) Q: S, T; (iv) K: L, M, N.The postorder vertex sequence of this tree is

• A. P, S, T, J, Q, R, H, L, M, N, K,
• B. J, P, S, T, Q, R, H, L, M, N, K,
• C. P, S, T, Q, R, J, H, L, M, N, K, B
• D. P, S, T, Q, R, H, L, M, N, K, J,