| Read the assertion and reason carefully to mark the correct option out of the options given below: |
| Assertion : Tobacco is a local irritant. |
| Reason : It does not show stimulant behaviour. |
A) If both assertion and reason are true and the reason is the correct explanation of the assertion.
B) If both assertion and reason are true but reason is not the correct explanation of the assertion.
C) If assertion is true but reason is false.
D) If the assertion and reason both are false.
E) If assertion is false but reason is true.
Correct Answer: C
Solution :
Tobacco acts as a local irritant. Used as snuff, it excites violent sneezing and a copious secretion of mucus on chewing, it irritates the mucous membrane of the mouth and increases the flow of saliva. Nicotine is the major stimulatory compound of tobacco products including cigarettes. It is highly poisonous as well as a habit forming alkaloid. It stimulates passage of nerve impulses, causes muscles to relax and causes the release of adrenaline, increasing both blood pressure and heart beat rate.
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