railway RRB Technician Grade 3 Mock Test 2024 General Science Biology Scientific Developments

ଆଲେକଜାଣ୍ଡାର ଫ୍ଲେମିଙ୍ଗ ନିମ୍ନଲିଖିତ ମଧ୍ୟରୁ କେଉଁ ଉପରେ କାମ କରିଛନ୍ତି ? 

1
କିଣ୍ଵନ 
2
ବସନ୍ତ ର ଟୀକା 
3
ପେନିସିଲିନ ର ଆବିଷ୍କାର 
4
DNA ସରଞ୍ଚନା 
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