Ten family members are seated in two parallel rows of five each, with equal spacing between adjacent persons. In row 1, A, B, C, D, and E sit facing n...

Ten family members are seated in two parallel rows of five each, with equal spacing between adjacent persons. In row 1, A, B, C, D, and E sit facing north. In row 2, P, Q, R, S, and T sit facing south, so each person in one row faces a person in the other row.

Given:

• P faces the person who is 2nd to the left of his nephew.
• One person sits between P’s nephew and P’s mother.
• A is the sister-in-law of D, who is unmarried.
• S is the granddaughter of B, who sits to the left of P’s mother but not immediately to her left.
• R is the only brother of D and is the immediate neighbor of B’s wife.
• Q is the husband of S and sits 2nd to the right of R’s father.
• A is the daughter of E and faces the person who is 2nd to the right of Q’s wife.
• P is the brother-in-law of R, who is the father of C.
• T’s son sits immediately to the right of C’s brother-in-law.
• A’s father-in-law sits at one of the extreme ends.
• D and A are of the same gender but opposite to C’s gender.
• B is not the father of R.

Question: Four of the following five belong to a group based on a certain common characteristic. Who does NOT belong to this group?