Explanation:

Let’s analyze both the statements:

- Statement 1: R is shorter than P but taller than other friends.

  - So, P > R > others (Q, S, T, U in some order).

  - But nothing specific about S and T relative to each other.

- Statement 2: U is taller than Q but shorter than S, although Q is not the shortest.

  - So, S > U > Q. Q is not the shortest, so there is someone else shorter than Q.

  - Nothing about T here.

- Combining Both:

  - Even when we combine: We know P > R > (Q/S/T/U in some order) and S > U > Q, but T’s height relative to S is not directly established in either. No way to compare S and T concretely.

- Option Explanation:

  - Option 1: Not sufficient (lack of information about S & T relative to one another).

  - Option 2: Not sufficient (doesn’t mention T).

  - Option 3: Sufficient—Neither statement, together or alone, lets us compare S and T.

  - Option 4: Not sufficient, as explained.

Correct Answer:

Option 3: Both 1 and 2 are not sufficient.