Which areas were designated as part of Pakistan based on the religious majority?

Areas with the Muslim majority

The decision to partition what was formerly referred to as 'India' into 'India' and 'Pakistan' was a profoundly challenging and emotionally charged process. The division entailed immense difficulty in both the decision-making and implementation phases. The guiding principle for this division was based on religious majorities, wherein regions with a Muslim majority were designated as part of Pakistan, while the remaining areas were to remain under the governance of India. This division posed considerable hardships and evoked great pain for the people involved in this historic event.