单项选择题

一种核酸外切酶与pApGpUpCpApGpU一起保温,其水解产物中不含有

A.PA+pG+pUpCpApGpU
B.PApG+pUpC+pApGpU
C.2pA+2pG+2pU+pC
D.PApGpUpCpA+pG+pU
E.PApGpUpCpApG+pU