railway DFCCIL Junior Executive 2023 (CBT 1 & CBT 2) Mock Test General Science Biology Human body

କେଉଁ ରକ୍ତ ଗୋଷ୍ଠୀ ହେଉଛି “ସର୍ବ ଗ୍ରହୀତା”?

1
A
2
AB
3
B
4
O
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