Which of the Following Reactions Is a Redox Single Replacement $\rightarrow$

Which of the following reactions is a redox single replacement reaction?

A) Zn + H₂SO₄ $\rightarrow$ H₂ + ZnSO₄
B) 2 KClO₃ $\rightarrow$ 2 KCl + O₂
C) 2 NO₂ + H₂O₂ $\rightarrow$ 2 HNO₃
D) SO₃ + H₂O $\rightarrow$ H₂SO₄