Final answer:
The right that is not an inmate due process right in the area of prison disciplinary hearings is the right to a speedy trial.
Step-by-step explanation:
The correct answer is b. Right to a Speedy Trial. This right is not an inmate due process right in the area of prison disciplinary hearings. The Sixth Amendment guarantees the right to a speedy trial, but it does not explicitly apply to prison disciplinary hearings. The other options, such as the right to legal representation, the right to present evidence, and the right to a public trial, are all protected by the inmate's due process rights.