Assertion (A) : Principle of operation of AC generator is electromagnetic induction.
Reason (R) : Resistance offered by inductor for AC is zero.

Options

A. Both A and R are true and R is the correct explanation of A.
B. Both A and R are true and R is NOT the correct explanation of A.
C. A is true but R is false
D. A is false and R is true

Explanation

To analyze the given assertion and reason, we will break down the statements and evaluate their validity step by step.

### Step 1: Evaluate the Assertion (A)
**Assertion (A): Principle of operation of AC generator is electromagnetic induction.**

- The principle of operation of an AC generator is indeed based on electromagnetic induction. When a coil rotates in a magnetic field, the magnetic flux linked with the coil changes, which induces an electromotive force (EMF) in the coil according to Faraday's law of electromagnetic induction. Thus, this statement is **True**.

### Step 2: Evaluate the Reason (R)
**Reason (R): Resistance offered by inductor for AC is zero.**

- An inductor does not offer zero resistance for AC. Instead, it offers reactance, which is frequency-dependent. The reactance of an inductor increases with the frequency of the AC signal. While it is true that an inductor can oppose changes in current, it does not mean that it has zero resistance. Therefore, this statement is **False**.

### Conclusion
- The assertion (A) is **True**, while the reason (R) is **False**.

### Final Answer
- The correct answer is: Assertion (A) is true, but Reason (R) is false.

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