Mr. Anies, let us suppose a particular question contains four sub-questions 3 (a), 3 (b), 3 (c) & 3 (d). You have the choice to answer any sub-question which you are very confident of. If say, you know the answer to question 3 (c) very well, you can write the answer for this question first. Next you know the answer to question 3 (a) then answer for this question. Suppose you know only a portion of answer for question 3 (d) and do not know the answer for the question 3 (b), then in that case you just leave ample space for the question to be answered later.
The objective to write answers in the order of your preference is to impress the examiner with your presentation and score good marks. There is nothing like all the answers must be written sequentially for questions containing sub-questions.
It is important to note that every question has to be answered in fresh sheet and if a question contains many sub-questions, try answering all of them at one place in which ever order you know the answer of the sub question. Ex: 3 (b), 3 (d), 3 (a) etc. Keep in mind pages are not a constraint in the examination, since you have paid for the Examination fees, so make use of the pages liberally and legibly.
Wish you best of luck for your November 2014 Examination.