Answer:
b. dissociative amnesia
Step-by-step explanation:
Dissociative amnesia, in psychology, is considered as one of the different types of dissociative disorder that generally involves an individual's incapability to recall different important and personal information that wouldn't be lost with a simple forgetting. However, dissociative amnesia is generally caused by stress or trauma that a person goes by in his or her life. Therefore, the further diagnosis of a person dealing with it is done based on the other related causes.
Symptoms: Self-harm, memory loss, depersonalization, etc.
As per the question, Hector is displaying dissociative amnesia.