alleryমানৱ শৰীৰৰ আটাইতকৈ কঠিন শাৰীৰিক কলাবিধ কি যিয়ে দাঁতৰ মুকুট অংশক (ক্ৰাউন) আৱৰি ৰাখে?
Aদাঁতৰ এনামেল
Bকম্পেক্ট অস্থি
Cডেন্টিন কলা
Dডেণ্টাল চিমেণ্ট
Answer & Solution
Correct answer: A. দাঁতৰ এনামেল
এনামেল হৈছে অতিমাত্ৰা খনিজযুক্ত কেলচিয়াম ফছফেটৰে গঠিত আৰু ই মানুহৰ শৰীৰৰ আটাইতকৈ কঠিন পদাৰ্থ।
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