Basic General Knowledge
Primary rainbow is formed when light suffers

no internal refraction
two internal refractions before emerging out of the drop
either one or two internal refractions before emerging out of the drop
one internal refractions before emerging out of the drop

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Basic General Knowledge
Yuri Gagarin was

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

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