Assertion : Solids can support both longitudinal and transverse waves but only longitudinal waves can propagate in gases. Reason : For the propagation of transverse waves, medium must also neccessarly have the property of rigidity.

• A. If both assertion and reason are true and the reason is the correct explanation of the assertion.
• B. If both assertion and reason are true but reason is not the correct explanation of the assertion.
• C. If assertion is true but reason is false.
• D. If the assertion and reason both are false.