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Assertion (A) : Atomic radii increase fr...

Assertion (A) : Atomic radii increase from top to bottom in a group of the periodic table.
Reason (R) : The number of shells in a group top to bottom increases.

A

`1`. Both `A` and `R` are correct and `R` is correct explanation of `A`

B

`2`. Both `A ` and ` R` are correct but `R` is not correct explanation for `A`

C

`3`.` A` is true but `R` is false.

D

`4`. `A` is false and `R` is true.

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