This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrinology, Subject name: Pediatrics
Features of Laurence-Moon-Biedl syndrome include: 
Select and explain. 
A. Hypogonadism, B. Obesity, C. Polydactyly, D. All of the above
D: All of the above
Answer: D: All of the above 
Explanation: d. All of the above(Ref: Nelson's 20/e p 2514, Ghai 8/e p 532)Laurence-Moon Syndrome: It is an autosomal recessive disorder of hypogonadotrophic hypogonadism, which is characterized by mental retardation, obesity, polydactyly, retinitis pigmentosa and hypogonadism.