AIIMS 2018 Physics Wave Propagation Assertion Reason Question

Option A is correct because both the assertion and reason are true: solids can indeed support both longitudinal and transverse waves due to their rigidity, while only longitudinal waves can propagate in gases because gases lack the necessary rigidity to support transverse wave motion. The reason correctly explains the assertion, as the property of rigidity is essential for the propagation of transverse waves. Other options are incorrect because option B suggests that the reason does not explain the assertion, which is not the case, while options C and D incorrectly state that either the assertion or reason is false. Understanding wave propagation in different states of matter is crucial in physics, particularly in the study of sound waves and material properties.