This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Schizophrenia and other psychotic disorders, Subject name: Psychiatry
Infidelity & jealousy involving spouse is the thought content of which disorder 
Select and explain. 
A. Capgras syndrome, B. Othello syndrome, C. Hypochondrial paranomia, D. Declerambault's syndrome
B: Othello syndrome
Answer: B: Othello syndrome 
Explanation: When the content of delusions is predominantly jealousy (infidelity) involving the spouse, it is called as Othello syndrome or conjugal paranoia. Ref: A Sho Textbook of Psychiatry, Niraj Ahuja, 7th Edition, pg. no. 84