Fill in the blank with a suitable preposition.
Raj is planning to throw _______ his old clothes.
The preposition ‘of’ and ‘off’ are frequently confused in spite of their difference. ‘Of’ is used to denote belonging or connection, while ‘off’ means to get rid of or keep away from something. In the given sentence Raj wishes to get rid of his old clothes, therefore, option B is correct, whereas option A is incorrect. The preposition ‘up’ is unsuitable here, because ‘throw up’ means to vomit which is inappropriate here. Thus option C is incorrect. Similarly ‘in’ would once again be irrelevant because ‘throw in’ denotes the act of throwing a ball into the field, which is unsuitable here. Thus option D is incorrect.