This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General obstetrics, Subject name: Gynaecology & Obstetrics
Karyotype of Paial mole 
Select and explain. 
A. 45XO, B. 46XX, C. 46XY, D. 69XXX
D: 69XXX
Answer: D: 69XXX 
Explanation: Paial moles have a triploid karyotype (69 chromosomes); the extra haploid set of chromosomes usually is derived from the father.When a fetus is present in conjunction with a paial mole, it generally exhibitsthe stigmata of triploidy, including growth retardation and multiple congenital malformations such as syndactyly and hydrocephaly.Ref: Berek and Novak&;s Gynecology; 15th edition; Chapter 39