The correct order of the size of Be, C, F and Ne is
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a
Be>C>F>Ne
b
Be
c
F
d
Be>C>F
answer is D.
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Detailed Solution
Along the period (→), size decreases. But size of noble gases is slightly greater than the preceding element(i.e halogens) due to repulsion between all paired electrons (sn2 np6)Hence the answer is (4)