Step 1: LEOPARD syndrome is a multisystem disorder whose name is an acronym for its main features. The question asks which listed feature is NOT part of it.
Step 2: Expanding the acronym: L = Lentigines, E = Electrocardiographic conduction abnormalities, O = Ocular hypertelorism, P = Pulmonary stenosis, A = Abnormal genitalia, R = Retarded growth, D = Deafness (sensorineural).
Step 3: Matching the options: growth retardation is the R, ECG changes are the E, and hypertelorism is the O. All three are genuine components.
Step 4: The A in LEOPARD stands for abnormal genitalia, which in fact reflects hypogonadism, not hypergonadism. Therefore hypergonadism is the feature that does NOT belong, so option d is the exception and the correct answer.