(A) : Sound waves cannot propagate through vacuum, but light waves can
(R) : Sound waves cannot be polarised but light waves can be

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(A) is true but (R) is false

Both (A) and (R) are true but (R) is not the correct explanation of (A)

Both (A) and (R) are true and (R) is the correct explanation of (A)

Both (A) and (R) are false

answer is B.

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Detailed Solution

Sound waves are mechanical wave so, cannot propagate through vacuum but light waves being non-mechanical wave don't necessarily require medium to travel.
Sound waves are longitudinal waves so, cannot be polarised but light waves can be because they are transverse in nature.

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