Basic General Knowledge
DRDL stands for

Differential Research and Documentation Laboratary
Department of Research and Development Laboratory
None of the listed here
Defence Research and Development Laboratary

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Basic General Knowledge
Yuri Gagarin was

None of these
the first person to fly at great height of about 340 km from the earth
a Russian cosmonaut & became the first man to travel in space.
both (a) and (b)

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