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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
Ar > Kr > Xe > He > Ne
b
Kr > Xe > He > Ar > Ne
c
Xe > Kr > Ar > Ne > He
d
He > Ne > Ar > Kr > Xe
answer is B.
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