What is a trojan horse in computer science?

type of malware that is often disguised as legitimate software. Trojans can be employed by cyber-thieves and hackers trying to gain access to users' systems. Users are typically tricked by some form of social engineering into loading and executing Trojans on their systems.

Explanation its malware

answer; i believe the correct answer is (b) by using a multimeter;

answer7 pin connector;