All are components of Laurence Moon Biedl syndrome, EXCEPT -: (A) Digital anomaly, (B) Asthenic built, (C) Mental retardation, (D) Hypogonadism
Answer is B. In Lawrence Moon - Beidle syndrome the patient is obese, not asthenic
Other features are -

Mental retardation
Retinitis pigmentosa
Polydactyly
Hypogonadotropic hypogonadism (This causes Amenorrhoea)