21.Which of the following are(isomers? H;CBr HN(CH3)2 H.C CH H;C CO2H gind 5 B)2and 5 C)3 and 5 D)2 and3 E)2.and5 Page7Page 7 21. Which of the following are (Z) isomers? H3C Cl Br CH3 H3C H CO2H CH3 H H3C CHO CO2H H3C C6H5 CO2H H H H3C N(CH3)2 CH3 4 5 1 2 3 A) 1 and 5 B) 2 and 5 C) 3 and 5 D) 2 and 3 E) 2, 4 and 5 Ans: B