engineering recuitment Indian Coast Guard Yantrik Mock Test 2024 General Science Biology Invention and Discoveries

“ଏକ୍ସ-ରେ” କାହା ଦ୍ଵାରା ଉଦ୍ଭାବନ କରାଯାଇଥିଲା?

1
ହପକିନ୍ସ
2
ରୋଏଣ୍ଟେନ୍ 
3
ମାର୍କୋନି 
4
ମୋର୍ସେ 
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