窦性P波振幅的正常值为（　）。

A.肢体导联＜0.25MV，胸前导联＜0.15MV

B.肢体导联＜0.20MV，胸前导联＜0.25MV

C.肢体导联＜0.25MV，胸前导联＜0.25MV

D.肢体导联＜0.25MV，胸前导联＜0.20MV

E.肢体导联＞0.25MV，胸前导联＜0.20MV