The terms ‘Wanna Cry, Petya and Eternal Blue' sometimes mentioned in the news recently are related to

The correct answer is C) Cyber attacks. WannaCry, Petya and EternalBlue are names of malicious software and attack methods that made headlines in 2017. WannaCry was a ransomware worm that locked files across many countries, including hospitals in the UK, and spread by exploiting a Windows SMB flaw. EternalBlue was the exploit tool, originally developed by the NSA and leaked by the Shadow Brokers group in April 2017. Petya, and the related NotPetya that struck in June 2017, were destructive malware aimed at Windows systems.

Why the others are wrong:

• A) Exo-planets are planets outside our solar system, an astronomy topic with no link to malware.
• B) Crypto-currency is tempting because WannaCry demanded its ransom in Bitcoin, but these terms name malware, not a currency.
• D) Minisatellites are small satellites used for communication or research, unrelated to software attacks.

Core concept: ransomware and cyber threats, which fall under Internal Security (cyber security and the role of CERT-In) and recur in Mains on digital safety and critical infrastructure. Patch management was the key defence here, since WannaCry hit systems that had not applied Microsoft's MS17-010 update.

Trap: candidates pick crypto-currency because of the Bitcoin ransom link. Ask what the term names: a piece of software or an attack, not money.