1.  Questions : In a row of five buildings _ P, Q, R, S and T, which building is in the middle ?
Statements : 

I.  Buildings S and Q  are at the two extreme ends of the row.
II. Buildings T is to the right of building R.

A. I alone is sufficient while II alone is not sufficient.
B. II alone is sufficient while I alone is not sufficient.
C. Either I or II is sufficient is sufficient.
D. Neither I nor II is sufficient.
E. Both I and II are sufficient.

Answer: Option D

Explanation:

From I, we have the order : S, -, -, -, Q.

From II, we have the order : R, T.

Combining the above two, we get two possible order :

S, R, T, Q or S, P, R, T, Q.

Thus, either T or R is in the middle.