Help regarding MCQ in CA Final Old course

Hello, I am appearing in CA Final Old course exam for Nov 2019 after a long break. I have following queries relating to MCQs

1.Does the answer to MCQ questions should also include workings wherever workings are done?

2.Where should I do the workings for MCQs....can I do them on main answer sheet or OMR sheet is accompanied with extra sheet ?

Sorry if my query sounds ignorant and thanks in advance.