Choose the correct option for the following Assertion (A) and Reason (R).

Assertion

For a point sound source of fixed acoustic power, moving a listener from distance r to r/2 increases the sound-intensity level by about 6 dB.

Reason

Sound intensity varies as 1/r², so halving the distance multiplies intensity by 4 and 10log₁₀4 ≈ 6.02 dB.