This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Impoant Genetic Syndromes, Subject name: Pediatrics
Which among the following is the most common chromosomal anomaly encountered in spontaneously aboed foetuses? 
Select and explain. 
A. Trisomy 13, B. Trisomy 18, C. Trisomy 21, D. Trisomy 16
D: Trisomy 16
Answer: D: Trisomy 16 
Explanation: Among the spontaneously aboed foetuses, autosomal trisomies are the most common chromosomal caus. Within this category, trisomy 16 is the most frequent The recurrence risk of trisomy 16 is negligible in subsequent pregnancies