Read the passage and answer the five questions that follow.

The Constituent Assembly deliberated upon the Indian Constitution, which came into effect on 26 January, 1950. It has the dubious distinction of being the longest in the world. But its length and complexity are perhaps understandable when one considers the country's size and diversity. At Independence, India was not merely large and diverse, but also deeply divided. A Constitution designed to keep the country together, and to take it forward had necessarily to be an elaborate, carefully-worked-out, and painstakingly drafted document. For one thing, it sought to heal wounds of the past and the present, to make Indians of different classes, castes and communities come together in a shared political experiment. For another, it sought to nurture democratic institutions.

How can we say that the Constitution of India seeks to unify India?

It was designed to keep the country's divided classes, communities and castes together.

The correct answer is Option (3) - It was designed to keep the country's divided classes, communities and castes together.

The passage mentions several ways the Constitution of India seeks to unify the country but the strongest assertion is that it was designed to keep the country's divided classes, communities and castes together.

As per the passage:

A Constitution designed to keep the country together, and to take it forward had necessarily to be an elaborate, carefully-worked-out, and painstakingly drafted document.