Fill in the blank with a suitable preposition:
A preposition is a word which comes before a noun or a pronoun and establishes a relationship between the elements of a clause or words. Option B)between is correct as it indicates separation. The other options are wrong as among, amongst, and within indicate something that is surrounded by other things, an alternative to among, and something inside or not further than a particular area or space respectively. These uses don't fit in the given question. The correct answer is B)between.