Solved UPSC CDS/OTA Question
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Q · Reproductive Systemmedium · 45s
The placenta originates from:
TopicReproductive System
Question Typemultiple choice
Difficultymedium
Marking+1 / −0.33
Test Duration30 min
Step-by-Step Solution
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The placenta forms from the syncytiotrophoblast and cytotrophoblast (fetal) interacting with the decidualized endometrium (maternal), creating the maternal–fetal interface.
Final Answer: Option B - Fetal trophoblast and maternal decidua