Hello. You did not present the map to which this question refers, which makes it impossible for it to be answered. However, taking into account the historical context of the partition of India and the context of the response options, we can consider that the option selected above, is the correct answer, because it is a fact.
The partition of India occurred after the country became independent from the British Empire. At that time, the country had difficulties in maintaining political and governmental order, in addition to suffering a strong religious crisis, which was what was the great trigger for the division of India into two countries: India and Pakistan.
Pakistan was dominated by Muslim forces, which forced a large number of Hindu citizens to migrate to India, where they could practice their religion without suffering any reprisals.