This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Schizophrenia Spectrum and Other Psychotic Disorders, Subject name: Psychiatry
A 70 year old male, Babulal was brought to the hospital with the history of third person auditory hallucinations. He has no history of similar problems previously. What is the most likely diagnosis? 
Select and explain. 
A. Dementia, B. Delusional disorder, C. Schizophrenia, D. Acute psychosis
A: Dementia
Answer: A: Dementia 
Explanation: Third person auditory hallucinations for the first time in a 70 year old old individual should strongly raise the suspicion of an organic mental disorder such as dementia. Although its an incomplete question, and information about duration of symptoms, any memory disturbances would have helped in making a more definitive diagnosis.