Basic General Knowledge
The Rh factor refers to

a process that speeds up the clothing of blood
a protein substance found in the blood of some people
the ratio of red corpuscles to white corpuscles in the blood
a hormone carried by the blood

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Basic General Knowledge
Primary rainbow is formed when light suffers

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

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