Which of these is NOT a type of non-judicial punishment?

The answer is based on the nature and function of non-judicial punishment. Non-judicial punishment is typically used to address minor offenses within military or similar disciplines without resorting to court-martial procedures. This type of punishment generally includes corrective measures that are aimed at maintaining discipline while allowing individuals to continue serving without the severe repercussions that come from judicial actions.

The choice related to the revocation of a good conduct medal does not fit into the category of non-judicial punishment. Instead, it is a consequence of disciplinary actions that may result from a more formal administrative process or judicial punishment. Unlike extra duties, reduction in rank, or field confinement, which are direct forms of non-judicial punishment imposed to correct behavior and maintain order, revoking a medal is more of an external recognition that reflects on a service member's overall conduct and achievements, rather than serving as an immediate corrective penalty.

This understanding of punishment types is crucial in grasping how military discipline operates and the different avenues available for addressing misconduct.