Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). In the light of the above statements, choose the most appropriate answer from the options given below:
- (A) is not correct but (R) is correct
- Both (A) and (R) are correct and (R) is the correct explanation of (A)
- Both (A) and (R) are correct but (R) is not the correct explanation of (A)
- (A) is correct but (R) is not correct
Answer
(3) Both (A) and (R) are correct but (R) is not the correct explanation of (A)
Solution
As per NCERT, Spirulina can be grown easily on waste water from potato processing plants (containing starch), straw, molasses, animal manure and even sewage, to produce large quantities; this also reduces environmental pollution (A) is correct.
Spirulina is rich in protein, minerals, fats, carbohydrates and vitamins, so it is used as single cell protein (R) is correct.
Its use in reducing pollution is due to its growth on waste materials, not due to its nutrient content, (R) does not explain (A).
Answer: (3)