In `Delta DEF and Delta PQR`, it is given that `angle D=angle Q and angle R= angleE`, then which of the following is not true?

Options

A. `(EF)/(PR)=(DF)/(PQ)`
B. `(DE)/(PQ)=(EF)/(RP)`
C. `(DE)/(QR)=(DF)/(PQ)`
D. `(EF)/(RP)=(DE)/(QR)`

Explanation

To solve the problem, we need to analyze the given information about triangles DEF and PQR.

### Step-by-Step Solution:

1. **Identify the Given Angles:**
We are given that:
- \( \angle D = \angle Q \)
- \( \angle R = \angle E \)

2. **Apply the Angle-Angle (AA) Similarity Criterion:**
Since two angles of triangle DEF are equal to two angles of triangle PQR, we can conclude that:
- Triangle DEF is similar to triangle PQR by the AA similarity criterion.

3. **List the Corresponding Angles:**
From the similarity, we can state:
- \( \angle D = \angle Q \)
- \( \angle E = \angle R \)
- Let’s denote the third angle in triangle DEF as \( \angle F \) and the third angle in triangle PQR as \( \angle P \). Therefore, \( \angle F = \angle P \) (since the sum of angles in a triangle is 180 degrees).

4. **Write the Proportionality of Sides:**
Since the triangles are similar, the corresponding sides are proportional:
\[ \frac{DE}{QP} = \frac{EF}{PR} = \frac{DF}{QR} \]

5. **Evaluate the Options:**
We need to determine which statement is not true based on the proportionality of the sides. The options typically involve ratios of the sides of the triangles.

6. **Identify the Incorrect Statement:**
Given the proportionality, if an option states something like \( \frac{DE}{PQ} \), it would not be true because \( PQ \) is not a corresponding side to \( DE \) in the similarity relation. The correct corresponding side to \( DE \) is \( QP \).

7. **Conclusion:**
Therefore, the option that states \( \frac{DE}{PQ} \) is not true, and we can conclude that option B is the incorrect statement.

### Final Answer:
The option that is not true is option B.