तीन कथन और उनके बाद तीन निष्कर्ष नीचे दिए गए हैं। कथन यद्यपि सामान्य ज्ञात तथ्यों से असंगत प्रतीत हों, तो भी आपको उन्हें सत्य मानना है। सभी निष्कर्षों को पढ़िए और तब निश्चय कीजिए कि दिए गए निष्कर्षों में से कौन-सा/से निष्कर्ष, सामान्य ज्ञात तथ्यों की उपेक्षा करते हुए इन कथनों से तर्कसंगत रूप से अनुगमित होता है/होते हैं :
- कथन–1: कुछ डॉक्टर, शिक्षक हैं।
- कथन–2: सभी शिक्षक, इंजीनियर हैं।
- कथन–3: सभी इंजीनियर, वैज्ञानिक हैं।
- निष्कर्ष–I: कुछ वैज्ञानिक, डॉक्टर हैं।
- निष्कर्ष–II: सभी इंजीनियर, डॉक्टर हैं।
- निष्कर्ष–III: कुछ इंजीनियर, डॉक्टर हैं।
निम्नलिखित में से कौन-सा एक सही है?
Read this question in English
Three Statements followed by three Conclusions are given below. You have to take the Statements to be true even if they seem to be at variance from the commonly known facts. Read all the Conclusions and then decide which of the given Conclusions logically follows/follow from the Statements, disregarding the commonly known facts:
Statement–1. Some doctors are teachers.
Statement–2. All teachers are engineers.
Statement–3. All engineers are scientists.
Conclusion–I. Some scientists are doctors.
Conclusion–II. All engineers are doctors.
Conclusion–III. Some engineers are doctors.
Which one of the following is correct?
(a) Only Conclusion–I · (b) Only Conclusion–II · (c) Both Conclusion–I and Conclusion–III · (d) Both Conclusion–I and Conclusion–II
उत्तर और व्याख्या · explanation in English
Answer: (c) निष्कर्ष–I और निष्कर्ष–III दोनों
The doctors who are teachers are, by the chain of ‘all’ statements, also engineers and scientists. So “some engineers are doctors” and “some scientists are doctors” both follow; “all engineers are doctors” does not.
- Some doctors are teachers, and all teachers are engineers, so those doctors are engineers: some engineers are doctors (III follows).
- All engineers are scientists, so the same doctors are scientists: some scientists are doctors (I follows).
- Nothing says every engineer is a doctor, so II does not follow.
- ✓ I The doctor-teachers are engineers and hence scientists, so some scientists are doctors.
- ✗ II Only some engineers (those who are teacher-doctors) are known to be doctors; ‘all’ goes beyond the statements.
- ✓ III The doctors who are teachers are engineers, so some engineers are doctors.
Remember · A ‘some’ link passes down a chain of ‘all’ links: some A are B and all B are C, so some A are C.
Question and answer: UPSC's official GS Paper II (2022, Series A) — paper ↗ · answer key ↗. Explanation: Minimalist IAS, checked 30 Sept 2026 (how we verify). ·