Choose the correct alternative from the following : - Assertion (A) : There is no vaccine for AIDS. Reason (R) : The AIDS virus changes its genetic code.
Choose the correct alternative from the following : - Assertion (A) : Downpour of rain lessens the humidity in the atmosphere. Reason (R) : Rains are caused when atmosphere cannot hold more moisture.
Choose the correct alternative from the following : - Assertion (A) : Weeds should not be allowed to grow along with crops. Reason (R) : Weeds leave no space for plants to grow.
Choose the correct alternative from the following : - Assertion (A) : Appendix is a vestigial organ in human body. Reason (R) : It does not participate in digestion.