उपर्युक्त परिच्छेद से निम्नलिखित में से कौन-सा एक, सर्वाधिक तर्कसंगत और विवेकपूर्ण निष्कर्ष निकाला जा सकता है ?
Read this question in English
Which one of the following is the most logical and rational inference that can be made from the above passage?
(a) Invasive species should be used to rehabilitate desert areas and wastelands of a country. · (b) Laws against the introduction of foreign plants are unnecessary. · (c) Sometimes, the campaigns against foreign plants are pointless. · (d) Foreign plants should be used to increase the biodiversity of a country.
उत्तर और व्याख्या · explanation in English
Answer: (c) कभी-कभी, विदेशी पादपों के विरुद्ध मुहिम चलाना निरर्थक होता है ।
Most invasive species are neither very successful nor very harmful; new arrivals usually raise diversity and often drive no native species extinct. So campaigns against foreign plants are sometimes pointless — 'sometimes' keeps the claim within what the passage shows.
- ✗ (a) Invaders are said to colonise disturbed habitats; the passage does not recommend using them to restore deserts or wastelands.
- ✗ (b) 'Most' and 'in many cases' leave room for harmful invaders; declaring all such laws unnecessary goes too far.
- ✓ (c) If most invaders do little harm, some campaigns against them achieve nothing; 'sometimes' fits the passage's hedged claims.
- ✗ (d) Higher diversity is a side-effect of arrivals; the passage does not advise introducing foreign plants on purpose.
Remember · Match qualifiers: 'most' and 'in many cases' in the passage support 'sometimes', not 'unnecessary' or a new policy.
Question and answer: UPSC's official GS Paper II (2019, Series A) — paper ↗ · answer key ↗. Explanation: Minimalist IAS, checked 30 Sept 2026 (how we verify). ·