There are 4 questions based on the same puzzle. Answer the questions based on the given information: P, Q, R, S, T, U and V are seven people whose houses are in a row. The houses are numbered 1 to 7 from left to right.
• Neither P's house nor U's house is at the ends of the row.
• R's house is to the right of S's house.
• T and Q live adjacent to each other.
• V's house is among the three middle houses in the row.
• Q's house is not adjacent to R's but it is one of the two houses between R's and V's house.

Question 1a: Who among the following can stay in house no.2?