Assertion:
Today's youth in India like western music more than Indian classical music.
RI. Western music has strong base than Indian classical music.
RII. Indian classical music is very boring and they like rocking music more.
Answer: D
Hence the given assertion is about the preference of today's youth.
RI is talking about the strong base of western music. Having strong base does not imply that it is good to listen.
RII tells that youth like rocking music but there is no evidence that western music is rocking.\Neither RI nor RII is a reason.