According to the map shown in the figure, which one of the following statements is correct?
Note: The figure shown is representative.

From the map, we observe that the chemistry lab is indeed located to the southeast of the physics lab.
The other statements do not hold based on the positions on the map:
The library is not to the northwest of the canteen, it's located to the west.
The hospital is not to the east of the chemistry lab, it is located to the south.
The classrooms and canteen are not next to each other.

Consider the relationships among P, Q, R, S, and T:
• P is the brother of Q.
• S is the daughter of Q.
• T is the sister of S.
• R is the mother of Q.
The following statements are made based on the relationships given above.
(1) R is the grandmother of S.
(2) P is the uncle of S and T.
(3) R has only one son.
(4) Q has only one daughter.
Which one of the following options is correct?