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: Unknown
Laurence Moon Biedle syndrome -Associated with - 
Select and explain. 
A. Polydactyly, B. Mental retardation, C. Retinitis pigmentosa, D. All of above
D: All of above
Answer: D: All of above 
Explanation: Ans. is 'd' i.e., All of above [Ref: Harrison IS^/e p. 425\ Laurence-Moon-Biedl syndrome is characterized by:o Obesityo Mental retardationo Retinitis pigmentosao Polydactylyo Hypogonadotropic hypogonadism