All of the following statements are true regarding down syndrome except?: (A) Occurs due to meiotic non disjunction of chromosome 21, (B) Trisomy 21, (C) Most common CHD is enocardial cushion defect, (D) It is the most common trisomy in humans
Answer is D. Most common trisomy in humans is trisomy 16,most common type of autosomal trisomy that survive upto birth in trisomy 21.