This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous, Subject name: Psychiatry
Capgras syndrome is? 
Select and explain. 
A. Delusion of infidelity, B. Delusion of love, C. Delusion of double, D. Delusion of grandiose
C: Delusion of double
Answer: C: Delusion of double 
Explanation: Ans is 'c' i.e. Delusion of double Delusion of misidentificationA. Capgras syndrome (Delusion of double): - Belief that a familiar person has been replaced by an exact double i.e. an impostor.B. Fregoli syndrome: - Belief that a complete stranger is actually a familiar person already known to one.Also remember* Othello syndrome - delusion of jealousy (infidelity)* Declerambault's syndrome - delusion of love* Cotard's syndrome - Nihilistic delusions* Ekbom syndrome - Delusion of infestations.