railway RRB Technician Grade 1 Mock Test 2024 General Knowledge Science Technology and Inventions

ରାଡାର କିଏ ଉଦ୍ଭାବନ କଲା?

1
ୱିଲହେଲମ୍ କେ ରୋଏଣ୍ଟେନ୍
2
ଏଏଚ୍ ଟେଲର ଏବଂ ଲିଓ ସି ୟଙ୍ଗ୍
3
ଜେଏଚ୍ ୱାନ୍ ଟାସେଲ୍
4
ପିଟି ଫର୍ଣସୱର୍ଥ
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