In each of the following sentences four words are given in bold. These words may or may not replace each other to form a contextually and grammatically meaningful sentence. Below each sentence, four options are given for the replacements. You have to choose the correct replacement as your answer. If no replacement is required, choose no change required India’s move comes (a) against the backdrop of the need to find sources of energy at a time when it needs (b) to bridge a supply gap (c) a million tonnes of extra crude over the year to urgently procure (d) that will be caused by the exit of Iran.