This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Development period- week 1,2,3,4, Subject name: Anatomy
Trophoblast gives rise to all the following EXCEPT? 
Select and explain. 
A. Cytotrophoblast, B. Syncytiotrophoblast, C. Intra-embryonic mesoderm, D. Extra-embryonic mesoderm
C: Intra-embryonic mesoderm
Answer: C: Intra-embryonic mesoderm 
Explanation: Around day 6 - 8 after feilization : 1. Outer cell mass i) Cytotrophoblast ii) Syncytiotrophoblast 2. Inner cell mass of embryoblast i) Epiblast ii) Hypoblast Intraembryonic mesoderm is formed from epiblast cells.