This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pediatrics
Turner syndrome - karyotyping is? 
Select and explain. 
A. 45, X0, B. 46 X0, C. 47 XXX, D. Trisomy 21
A: 45, X0
Answer: A: 45, X0 
Explanation: Ans. is 'a' i.e., 45 XO 45X0 Lymphadema of dorsum of hand & fat Loose skin fold at nape of neck Sho stature Sho Neck (with webbing of neck) Anomalies ear Broad shield like chest with widely spaced small nipple Renal anomalies (Horse-shoe, souble or cleft renal pelvis) Coa of aoa