This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Mullerian Abnormalities, Subject name: Gynaecology & Obstetrics
Which of the following is true for Klinefilter's syndrome? 
Select and explain. 
A. 45 XO, B. Tall stature, C. Intelligent Quotient Normal, D. Normal testis and genitalia
B: Tall stature
Answer: B: Tall stature 
Explanation: Klinefelter syndrome Rare disorder, Karyotype 47 XXY, Externally resembles a male in general body conformity, Penis small or normal, Testes small, Gynaecomastia, Appearance eunuchoid, Mentally retarded, Azoospermia,Infeility, Tall stature, Testosterone may help in Rx Breasts may need surgical excision.