Assertion : Cocaine has a potent stimulating action on central nervous system, producing a sense of euphoria and increased energy.
Reason : Injecting the microbes intentionally during immunisation or infectious organisms gaining access into body during natural infection induces active immunity.
If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.
If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.
If the Assertion is correct but Reason is incorrect.
If both the Assertion and Reason are incorrect.
Haemoglobin is having maximum affinity with
Why is that once a person starts taking alcohol or drugs, it is difficult to get rid of this habit? Discuss it with your teacher.
Sleep is prevented by
Identify the molecules $(A)$ and $(B)$ shown below and select the right option giving their source and use.
Hallucinogens