railway RRB NTPC Mock Test Series 2024-25 (CBT 1 + CBT 2) General Science Biology Human body

ମଣିଷ ଶରୀରରେ କେଶ, ନଖ ଏବଂ ଚର୍ମର ଉପର ସ୍ତର ଗଠନ କରୁଥିବା ପ୍ରାଧାନ୍ୟ ପଦାର୍ଥ କ’ଣ?

1
ଲାମିନିନ
2
କୋଲାଜେନ୍ 
3
କେରାଟିନ୍ 
4
F ବ୍ରୋନେକ୍ଟିନ୍ 
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