Four of the following five are alike in a certain way and thus form a group. Find the one who doesn’t belong to the group? Study the following information carefully and answer the questions given below: S is the nephew of V who is the only brother-in-law of T. T has no siblings. X is the mother of W who is the father of S. Y who has only two children, and is the spouse of X. U is the mother of R who is the grandchild of Y.

The correct option is T.

Let us analyze the given family relationships step-by-step to determine the gender of each person and the overall structure of the family tree:

1. Relationship between V, T, W, X, and Y:
- "T has no siblings."
- "V is the only brother-in-law of T." Since T has no siblings, T must be married to someone whose brother is V. Thus, V is male (a brother).
- "X is the mother of W." So X is female.
- "Y, who has only two children, is the spouse of X." Since X is female, Y must be her husband (male).
- Y and X are the parents of two children. One child is W (father of S). Since V is a brother of W (or sibling's spouse/sibling), the two children of X and Y are W and V.
- Since T is married to W (or V's sibling), and T has no siblings, T is the spouse of W. Since W is male ("father of S"), T is female (mother of S).

2. Relationship between S, U, R, and others:
- "W is the father of S", making W male.
- "S is the nephew of V." S is a male child (nephew).
- "U is the mother of R who is the grandchild of Y."

3. Analyzing Genders of the given options:
- Y: Male (Spouse of X)
- W: Male (Father of S)
- V: Male (Brother-in-law of T)
- T: Female (Spouse of W, mother of S)

Among the four options given (Y, T, W, V), Y, W, and V are all male, whereas T is female. Therefore, T does not belong to the group.