Multiple choice Which of the following substituents are m-directing? -CHO -CCl3 -CH3 -NH2 Only 1 and 2 Only 1, 2 and 3 Only 1 and 3 Only 2 and 4 Only 2, 3 and 4 Reveal answer Fill a bubble to check yourself A Correct answer Explanation Yes, it is correct. -CHO is m-directing due to –R effect. -CCl3 is m-directing due to –I effect.