Which data is considered subjective?

Subjective data refers to information that is based on personal opinions, interpretations, feelings, or experiences, as opposed to objective data, which can be measured or verified. Deep pain associated with an injury is a classic example of subjective data, as it is solely reported by the patient. The experience of pain varies greatly from one person to another, and it cannot be measured or observed directly by someone else.

In contrast, the other choices represent objective data: the patient's heartbeat can be measured using medical instruments; gray discoloration of the skin can be observed visually; and laboratory reports provide quantitative results that can be verified through tests. Therefore, deep pain is seen as subjective because it relies on the patient's personal description and feelings regarding their experience of pain.