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Gynaecology & Obstetrics General obstetrics 6b793f7f

Which of the following statements about twinning Is true?

A
The frequencies of monozygous and dizygous are the same
B
Division after formation of the embryonic disk result in conjoined twins
C
The incidence of monozygotic twinning varies with race
D
A dichorionic twin pregnancy always denotes dizygosity
High-Yield Explanation
Dizygotic twins arise from feilization of two Ova by different spermatozoa.Each twin has its own placenta,chorion and amnion. Monozygotic twins always result from splitting of a single feilised ovum and hence always of the same sex and look alike (refer pgno:178 sheila textbook of obstetrics 2 nd edition)
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