This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Psychiatry
Anterograde amnesia is seen in : a) Head injuryb) Strokec) Spinal cord injury (Traumatic paraplegia)d) Alzheimer's disease 
Select and explain. 
A. acd, B. abd, C. abc, D. ab
B: abd
Answer: B: abd 
Explanation: Causes of Amnesia :

Physical Causes (Both antegrade and retrograde) : Head trauma, Degenerative brain disorders (e.g. Alzheimer's disease), blockage of cerebral blood vessels (stroke), infectious diseases, chronic alcoholism (korsakoff syndrome).
Psychogenic (Dissociative) amnesia → Retrograde.