Trophoblast gives rise to all the following EXCEPT?: (A) Cytotrophoblast, (B) Syncytiotrophoblast, (C) Intra-embryonic mesoderm, (D) Extra-embryonic mesoderm
Answer is C. 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.