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Start JEE / NEET / Foundation preparation at rupees 99/day !!
21% of IItians & 23% of AIIMS delhi doctors are from Sri Chaitanya institute !!
An Intiative by Sri Chaitanya
a
Oxygen, Hydrogen, Nitrogen, Chlorine
b
Nitrogen, Chlorine, Phosphorus, Sulphur
c
Hydrogen, Argon, Helium, Oxygen
d
Nitrogen, Hydrogen, Argon, Helium
answer is C.
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