Basic General Knowledge
Primary rainbow is formed when light suffers

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

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Basic General Knowledge
Leonardo da Vinci

was a great Italian painter, sculptor and architect
got universal fame form his masterpiece
drew models of organs such as the heart, lungs and womb
All of these

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