Given below are two statements, one labelled as Assertion (A) and the other labelled as **Reason (R):** Assertion (A):** When an observer moves towards a stationary sound source, the pitch (frequency) of the sound heard by the observer increases. **Reason (R):** The wavelength of the sound waves in the medium decreases as the observer moves towards the source. Select the correct answer using the codes given below:

Options:

• A: Both A and R are true and R is the correct explanation of A
• B: Both A and R are true but R is not the correct explanation of A
• C: A is true but R is false
• D: A is false but R is true

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