Identify a word that completes the sentence.
A ‘drum’ is a cylindrical container that is usually used for storing grains, powder or oil. It is apt for storing oil, hence option D is correct. On the other hand, a ‘casket’ is a small box or coffer that is used for storing jewels, coins, and other valuable possession. Therefore, option A is incorrect. Similarly, a ‘chest’ is a large box that is made of wood, which is used for storing and transporting jewels, coins, and other valuable possessions. Thus option B is incorrect. A ‘caddy’ is small storage container that contains a number of divisions to store a number of things at the same time, like tools, golf clubs etc. This would be unsuitable in the given context, as the noun is ‘oil’. Thus option C is incorrect.