Below are given some sentences out of which the sentence numbered 4 has been correctly placed. The rest of the sentences A, B, C, D, E, F need to be arranged correctly in order to form a logical order.

1. Of the two great rivers, the Indus, now mainly in Pakistan, had the earlier civilization.
2. The ancient civilization of India was conceived in a sharply demarcated sub-continent bounded on the North by the world’s largest mountain range – the Himalayas.
3. This barrier was however at no time an insuperable one and at all times both settlers and traders have found their way over the high passes into India while Indians have carried their commerce and culture beyond her frontiers by the same route.

4. India’s isolation, due to this mountain range, was never complete and the effect of the mountain range in developing her unique civilization has often been over-rated.

4. The Himalayas, with its extension from east to west at the tip of Northern India divide India from the rest of Asia and the world.
5. The real importance of the mountains is not so much the isolation they give her, as in the fact that they are the source of her two great rivers.
6. However, the Gangetic plain, where the Ganges flows, is the real seat of Hindu civilization and culture.