Six people, A, B, C, S, T and U, are sitting in a row facing north. Only two people sit to the right of A. Only two people sit between C and A. Only two people sit between S and B. S sits to the immediate right of C. U sits to the immediate right of B. How many people sit between T and U?

Given:

Six people, A, B, C, S, T and U, are sitting in a row facing north.

Only two people sit to the right of A.

Only two people sit between C and A.

Only two people sit between S and B.

S sits to the immediate right of C.

U sits to the immediate right of B.

Two people sit between T and U?.

Thus, correct option is (a).