Constitutional Law Conundrums

Kya maine fail kiya?! I got 73 marks in Constitutional Law. My weak area is definitely the Article 19(1)(a) part. I kept getting Article 19(1)(a) vs 19(1)(b) mixed up. Maine pucha to professors ne kaha hai ki ismein 19(1)(a) mein freedom of speech aur expression ka dhyan rakhein aur 19(1)(b) mein freedom of trade, commerce aur occupation ka. Lekin maine pata nahi isliye mere answer mein mistakes ho gaye.