UPSC CSE Prelims
Question 86
Consider the following statements :
- Some mushrooms have medicinal properties.
- Some mushrooms have psychoactive properties.
- Some mushrooms have insecticidal properties.
- Some mushrooms have bioluminescent properties.
How many of the above statements are correct?
View correct answer and explanation
Correct answer: D
Correct Option: D (All four)
Explanation: Fungi are chemically diverse: mushrooms can yield drugs, hallucinogens, insect-active metabolites and natural light-producing compounds.
Statement / Pair / Item-wise Analysis:
1. Correct/True - Certain mushrooms produce medicinal compounds such as immunomodulatory polysaccharides.
2. Correct/True - Psilocybin-containing mushrooms are psychoactive.
3. Correct/True - Some fungi produce metabolites with insecticidal effects.
4. Correct/True - Some mushrooms, such as certain Mycena species, are bioluminescent.
Option-wise Analysis:
A. Incorrect-it counts 1, but items 1, 2, 3, 4 qualify, giving 4.
B. Incorrect-it counts 2, but items 1, 2, 3, 4 qualify, giving 4.
C. Incorrect-it counts 3, but items 1, 2, 3, 4 qualify, giving 4.
D. Correct-exactly 4 of the 4 listed items satisfy the condition.