This is a type of malware that we download onto our smartphones, disguised as a legitimate and useful app, but usually takes control of our smartphones to damage, steal, or in general inflict some other harmful action on our data security.

Correct option is B

A Trojan is a type of malware disguised as legitimate software that users are tricked into downloading. Once installed, it can perform malicious actions such as stealing data, damaging systems, or enabling unauthorized access to the device. Important Key Points:
1. Trojan: Disguised as a legitimate app, it performs malicious activities once installed.
2. Adware: Delivers unwanted advertisements.
3. Spyware: Secretly monitors user activity and sends data to a third party.
4. Spam: Unsolicited messages, often for advertising purposes.
Knowledge Booster:
· Trojan Horses: Named after the ancient Greek story of the Trojan Horse, where something seemingly harmless conceals a threat.
· Mobile Security: Users should avoid downloading apps from untrusted sources to prevent Trojan infections.