Anterograde amnesia can be caused by

• A. decay.
• B. suggestion.
• C. hypnosis.
• D. a concussion.

Answer: (D)

Verified step by step guidance

1. Understand the concept of anterograde amnesia: It is a condition where an individual is unable to form new memories following the onset of the condition.
2. Identify the common causes of anterograde amnesia: These typically include physical brain injuries, such as concussions, which can disrupt the brain's ability to process and store new information.
3. Evaluate the options given: Decay, suggestion, and hypnosis are not typically associated with causing anterograde amnesia. Decay refers to the fading of memories over time, suggestion involves influencing someone's memory or perception, and hypnosis is a state of focused attention and increased suggestibility.
4. Recognize that a concussion is a type of traumatic brain injury that can lead to anterograde amnesia by damaging the brain regions responsible for memory formation.
5. Conclude that among the given options, a concussion is the most plausible cause of anterograde amnesia, as it directly affects the brain's ability to form new memories.