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Atomic radius decreases in a period, but...

Atomic radius decreases in a period, but affter halogens, the atomic radius suddenly increases. Thus, inert has almost highest radius in a period. The explanation for such an increases is

A

Inert gases has most stable configuration

B

Inert gases do not take part in bonding

C

Vander Wall's radius is reported in case of inert gases

D

None of these

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The correct Answer is:
C
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