This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General anatomy, Subject name: Anatomy
In hydatidiform mole, blood cells does not develop because of defect in 
Select and explain. 
A. Primary ectoderm, B. Mesoderm, C. Endoderm, D. Trophoblast
B: Mesoderm
Answer: B: Mesoderm 
Explanation: As organs form, a process called organogenesis, mesoderm interacts with endoderm and ectoderm to give rise to the digestive tract, the hea and skeletal muscles, red blood cells, and the tubules of the kidneys, as well as a type of connective tissue called mesenchyme. Ref:Human embryology Inderber singh