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

ନିମ୍ନଲିଖିତ ମଧ୍ୟରୁ କେଉଁ ଖଣିଜ ପଦାର୍ଥ ଓଜନ ଏବଂ ବୃଦ୍ଧିକୁ ନିୟନ୍ତ୍ରଣ କରେ?

1
ଫସଫରସ
2
ସିଲିକନ 
3
କ୍ୟାଲସିୟମ
4
ଆୟୋଡିନ୍
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