Best Answer Explained in Below-:

To understand why the third statement is false, let's break down the relationships described in the first two statements.

1. The first statement tells us that "Tanya is older than Sonya." This can be represented as T > S, where T stands for Tanya's age and S for Sonya's age.

2. The second statement says "Munya is older than Tanya." This can be represented as M > T, where M stands for Munya's age.

From these two statements, we can establish the following hierarchy:
- Since M > T and T > S, we can conclude that M > T > S. Thus, Munya is the oldest, followed by Tanya, and then Sonya.

3. The third statement claims "Sonya is older than Munya," represented as S > M. For this statement to be true, Sonya would have to be older than Munya, which contradicts our established relationships since we determined earlier that Munya is older than Tanya and, consequently, older than Sonya.

Since there is a direct contradiction between the claim of the third statement and the truth derived from the first two statements, we conclude that the third statement is false. Therefore, the correct choice is B) false.