In the following passage, some of the words have been left out. Read the passage carefully and select the correct answer for the given blank out of the four alternatives.
Passage:

Very simply, a checklist is a list of items required, things to be done or points to be considered, used as a reminder. This is clear. Is the _______________ implication equally clear? Perhaps not. A checklist is purely objective, no _______________ is involved. That means, if the checklist is framed as a set ______ questions, the answer to every question can only be a binary “Yes” _______ “No” and nothing in between; no shades of grey. Such objectivity is the very antithesis of the education system today, both in the way teaching happens and in the ____________ of the student.