8. Which molecule has a plane of symmetry? A) I HO H H CH3 H 10. I and II are: I Br B) II Innsbi (3) 9. Which is a meso compound? A) (2R,3R) -2,3-Dibromobutane B) (2R,3S) -2,3-Dibromopentane C) (2R,4R) -2,4-Dibromopentane D) (2R,4S) -2,4-Dibromopentane E) (2R,4S) -2,4-Dibromohexane H 11. I and II are: CH3 Br A) constitutional isomers. D) diastereomers. D 1.110 Hu HO OCH 3 CI CHCH3 CH3 A) constitutional isomers. D) diastereomers. II C) III Br- H-CHCH3 -H CH3 || tark H3C H F F III D || OCH 3 CI-Br D) More than one of these choices. (8 HOR B) enantiomers. E) not isomeric. HO-HOO B) enantiomers. E) not isomeric. C) identical. ba C) identical