Features of Laurence-Moon-Biedl syndrome include:

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.