Assertion:
Computer coaching centres are mushrooming all over India.
RI. Other than computer education, no other education is useful these days.
RII. People are opting for computer education in a big way.
Answer: B
RI : If only computer education is useful, then more people may tend to join these courses. If more people join and the existing coaching centres are not able to accommodate the new joinings, then new centres would be started. The reason explained in RI is based on a hypothetical situation (*no other education is useful*). Moreover, it very vagualy and indirectly explains the causes for the asseration made. Hence, this cannot be taken as a valid reason.
RII : This explains the cause behind the assertion and is valid.