Ill. (15 pts) Stereochemistry of organic molecules. Consider 12-19 when answering 11-15 CI CH, CHCH 14 12 13 15 CH, CI 19 16 17 18 11. Which pair are constitutional isomers to each other? A) 14 and 16 8) 17 and 19 C) 15 and 18 D) 12 and 15 12. Which pair are conformational isomers to each other? A) 14 and 16 B) 13 and 19 C) 16 and 19 D) 14 and 17 13. Which pair are diastereomers to each other? A) 14 and 17 8) 17 and 18 C) 15 and 16 D) 18 and 19 14. Which pair are enantiomers to each other? A) 14 and 17 B) 13 and 18 C) 16 and 19 D) 17 and 18 15. Which pair are identical in both conformation and configuration to each other? A) 16 and 19 B) 16 and 18 C) 14 and 19 D) 13 and 18