In the following questions, Statement of assertion (A) is followed by a statement of reason (R). 1. If both assertion and reason are true and the reason is the correct explanation of the assertion, then mark. 2. If both assertion and reason are true but the reason is not the correct explanation of the assertion, then mark. 3. If assertion is true statement but reason is false, then mark. 4. If both assertion and reason are false statements then mark.
Assertion: Many visitors to the hills suffer from skin and respiratory allergy problems. Reason: Conifer trees produce a large quantity of wind-borne pollen grains.A) 1
B) 2
C) 3
D) 4
Correct Answer: A
Solution :
Gymnosperm like Pinus usually grow on the slopes of hills and form dense forests of evergreen trees. The pollination in these plants takes place through wind and during peak hours, the microspore of Pinus are liberated as clouds of yellow dust (sulphur shower). On inhalation, these microspores (pollens) cause various allergies like dermatitis, asthma, allergic rhintis, hay fever etc., in human beings.
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