Which of the following processes is an isoentropic process?

Options

A. (a) Isothermal process
B. (b) Adiabatic process
C. (c) Isobaric process
D. (d) Isochoric process

Explanation

To determine which of the following processes is an isoentropic process, we need to understand the definition and characteristics of an isoentropic process.

### Step-by-Step Solution:

1. **Understanding Isoentropic Process**:
- An isoentropic process is defined as a process where the entropy of the system remains constant. The term "iso" means same, and "entropic" refers to entropy.

2. **Entropy Change (ΔS)**:
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