Which of the following species is hypervalent?

Which of the following species are hypervalent? (A) ClO_(4)^(-)" "(B)BF_(3) (C ) SO_(4)^(-2)" "(D)CO_(3)^(-2)

Which of the following species are hypervalent ? (I) ClO_(4)^(-) " "(II) BF_(3) (III) SO_(4)^(-2)" "(IV) CO_(3)^(-2)

Which of the following species are hypervalent ? (l) ClO _(4) ^(-) (ll) BF _(3) (lll) SO _(4) ^(2-) (lV) CO _(3) ^(2-)

Which of the following species are hypervalent? (P) ClO_(4)^(-) (Q) BF_(3) (R) SO_(4)^(2-) (S) CO_(3)^(2-)

Which of the following species exists: