A malware-infected networked host under the remote control of a hacker is commonly referred to as:

a. Trojan

b. Worm

c. Bot

d. Honeypot

Option C i. e., Bot is the correct option.

Explanation:

Because the bot is also a malware the infects the whole computer system and host's network by the hackers, using the remote control by which they remotely controlled the user's system without the permission of the user for the purpose of stealing the confidential data and the information from the computer system of the user they aimed.

Option a: Trojan

Explanation:

A Trojan or Trojan horse is one of the computer malware that exist in computing world. Trojan often appears as a legitimate software to deceive user to activate it by social engineering. Once the Trojan is activated in the user computer, a hacker can remote control the infected computer for malicious purposes such as removing files, sending files, displaying message or rebooting computer.

However, Trojan cannot be replicated in the infected computer.