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After np orbitals are filled, the next o...

After np orbitals are filled, the next orbital filled will be :-
(a). `(n+1)s`
(b). `(n+2)p`
(c). `(n+1)d`
(d). `(n+2)s`

A

(n+1)s

B

(n+2)p

C

(n+1)d

D

(n+2)s

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