The impaired memory for events occurring before the onset of amnesia is called as:

Correct option is B

Retrograde amnesia refers to the inability to recall memories for events that occurred before the onset of amnesia. It often results from brain trauma, injury, or conditions affecting the memory-related regions of the brain, such as the hippocampus. In this condition, the person retains the ability to form new memories but struggles to retrieve information stored before the event causing amnesia.
Key Characteristics:
· Loss of access to past memories, especially episodic or autobiographical memories.
· May affect varying time periods, from minutes to years prior to the amnesia-causing event.
· Commonly associated with brain injuries, stroke, or degenerative conditions like Alzheimer's disease.
Information Booster:
1. Anterograde Amnesia (Option c):
· Affects the ability to form new memories after the onset of amnesia.
· Does not impact past memories stored before the event.
2. Phonological Loop (Option a):
· A component of working memory responsible for verbal and auditory information.
· Not related to amnesia.
3. Visuospatial Sketchpad (Option d):
· Part of working memory dealing with visual and spatial data.
· Not related to amnesia.