Give a stream of consciousness and then the final answer. The Ministry of Truth (Newspeak: Minitrue) is the ministry of propaganda. As with the other ministries in the novel, the name Ministry of Truth is a misnomer because in reality it serves the opposite: it is responsible for any necessary falsification of historical events.

Based on this passage, what is the ministry of truth in 1984?
To answer the question, consider the following: The Ministry of Truth (Newspeak: Minitrue) is the ministry of propaganda.
So, the final answer is the ministry of propaganda.