#### Problem Statement:

Which of the following equations is a variable separable DE?

- A. (x + x2 y) dy = (2x + xy2) dx
- B. (x + y) dx – 2y dy = 0
- C. 2y dx = (x2 + 1) dy
- D. y2 dx + (2x – 3y) dy = 0

#### Problem Answer:

The variable separable DE is **C. 2y dx = (x2 + 1) dy**.

Solution:

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