Common Cold, AIDS is a pair of viral diseases. Viruses are a very common type of infectious disease. Viruses are the smallest life-form existing, since they are not even a single cell. It is almost like they are not alive at all. They are small strands of DNA-like cell material. A virus consists mostly of RNA and cannot survive without host cells.

Correct Option: A

Common Cold, AIDS is a pair of viral diseases. Viruses are a very common type of infectious disease. Viruses are the smallest life-form existing, since they are not even a single cell. It is almost like they are not alive at all. They are small strands of DNA-like cell material. A virus consists mostly of RNA and cannot survive without host cells.

Cancer is initiated when the inactive protooncogenes are activated to cellular oncogenes which trigger uncontrolled cell multiplication.

Correct Option: B

Cancer is initiated when the inactive protooncogenes are activated to cellular oncogenes which trigger uncontrolled cell multiplication.

Tranquillizers bring about depression of brain activity and feeling of calmness. Stimulants stimulate the nervous system, and increase alertness and activity. Hallucinogens (Cannabis products) alters thoughts, perceptions and feelings.

Correct Option: B

Tranquillizers bring about depression of brain activity and feeling of calmness. Stimulants stimulate the nervous system, and increase alertness and activity. Hallucinogens (Cannabis products) alters thoughts, perceptions and feelings.

Sarpgandha botanically known as Rauwolfia serpentina belongs to family Apocyanceae. Its tuberous roots are used as medicines. Ajmalicin is isolated from Sarpgandha.

Correct Option: D

Sarpgandha botanically known as Rauwolfia serpentina belongs to family Apocyanceae. Its tuberous roots are used as medicines. Ajmalicin is isolated from Sarpgandha.