UPSC Prelims 2018— Question 58

**Concept and analysis:** WannaCry and Petya were major malware/ransomware outbreaks, while EternalBlue refers to an exploit associated with vulnerabilities in Microsoft's SMB implementation and was used in the spread of WannaCry. These terms therefore belong to the domain of cyber security and cyber attacks, not exoplanets, cryptocurrency or mini-satellites. The question is testing precise UPSC-level identification rather than a broad association. The key is to distinguish the exact institutional, constitutional, historical, geographical, economic or scientific feature being asked. **Option-wise evaluation** **Option A:** Incorrect. Exo-planets is a different institution, place, definition, proposition or description and does not satisfy the specific requirement of the question. **Option B:** Incorrect. Crypto-currency is a different institution, place, definition, proposition or description and does not satisfy the specific requirement of the question. **Option C:** Correct. Cyber attacks directly matches the concept or factual identification established in the analysis. **Option D:** Incorrect. Mini satellites is a different institution, place, definition, proposition or description and does not satisfy the specific requirement of the question. **UPSC takeaway:** The safest way to solve this type of question is to anchor the answer in the defining feature of the concept and then test every option against that feature. Closely related institutions or terms are often used as distractors. In statement-based questions, do not judge the option as a whole before checking each statement independently. In factual questions, compare the wording of each option with the exact definition, location, institutional role, chronology or scientific property. The correct answer follows from that verification rather than from familiarity with a keyword.