Quyidagi moddalar orasidan murakkab efirlarning izomerlarini aniqlang.

33. (v15-121-21) Quyidagi moddalar orasidan murakkab efirlarning izomerlarini aniqlang. 1) C2H5OH; 2) CaH7OH; 3) CH3COOH; 4) CH3OH; 5) HCOOH; 6) C2H5COOH; 7) C3H7COOH A) 1, 2,3,4 B)3, 6, 7
C) 2, 3, 4, 5
D) 3, 5, 6, 7