The skip-able parts of the question are those which can be left without answering. If you skip a part of the question you may return to it later. There are few assignments in which once you skip a part of question you may not return to it again.
Explanation:
The question needs to be answered in sequence and skip-able parts of the question has given a choice to leave the part unanswered. There can be alternative questions available for skip able parts. If you skip a part of the question you may return to it later. There are few assignments in which once you skip a part of question you may not return to it again.
