Study the information carefully and answer the question given below:

Eight persons are in three generations of family and two married couples. P is the son-in-law of H who has three children. M is the nephew of L. W is the father of K, who is the sister-in-law of U. U is the only daughter of H, who is the father of N. L is unmarried. N and K don't have any children.

Who among the following is the son-in-law of W?