Give some stream of consciousness and then the answer. The Radcliffe Line was the boundary demarcation line between India and Pakistan published on 17 August 1947 upon the Partition of India. It was named after its architect, Sir Cyril Radcliffe, who, as chairman of the Border Commissions, was charged with equitably dividing 175,000 square miles (450,000 km) of territory with 88 million people. Today its western side still serves as the Indo-Pakistani border and the eastern side serves as the India-Bangladesh border.

Answer this question: who draw the border between india and pakistan?
The important part for answering this question is: It was named after its architect, Sir Cyril Radcliffe, who, as chairman of the Border Commissions, was charged with equitably dividing 175,000 square miles (450,000 km) of territory with 88 million people.
Therefore, the answer is Sir Cyril Radcliffe.