Directions: Select the most appropriate filler(s) for the blank(s) such that the sentence makes coherent sense.

The __________ of Madras port consists of the whole of Tamil Nadu, and a major part of Andhra Pradesh and Karnataka.

Of all the options, 'coast' and 'hinterland' seems to fit our prediction for the blank. 'Hinterland' (the land or district behind that bordering on a coast or river; specif., an inland region claimed by the state that owns the coast ) seems more appropriate than 'coast'  as it is in tandem with 'Madras port' and also satisfies the vastness as mentioned in the sentence. Hence, (4) is the answer.