The correct answer is: D. Deterministic
A deterministic channel is a channel in which the output is completely determined by the input. In other words, there is no noise or interference in the channel, and the output is always the same as the input.
The transition probability diagram shown in the figure shows that there is a 100% chance that a 0 input will be transmitted as a 0 output, and a 100% chance that a 1 input will be transmitted as a 1 output. This means that the channel is deterministic.
The other options are incorrect because they do not accurately describe the channel. A lossless channel is a channel in which there is no loss of information in the transmission process. A noiseless channel is a channel in which there is no noise or interference in the transmission process. A useless channel is a channel in which the output is not useful for the receiver.