Background:
The Constitution of India, which serves as the supreme law of the country, was not prepared in 1928. The question seems to have an incorrect premise. However, considering the involvement of prominent leaders in the making of the Indian Constitution, it is important to note their contributions.

Motilal Nehru:
Motilal Nehru was a prominent leader of the Indian National Congress and one of the key figures in the Indian independence movement. He served as the president of the Indian National Congress in 1919. In 1928, Motilal Nehru, along with other prominent leaders, played a significant role in drafting the Nehru Report.

The Nehru Report:
The Nehru Report was a document prepared by a committee of the All Parties Conference, which was convened in 1928. The committee was chaired by Motilal Nehru and had representation from various political parties and communities. The report aimed to propose a constitutional framework for India and was a response to the Simon Commission's recommendations, which were seen as inadequate by Indian leaders.

Key Features of the Nehru Report:
The Nehru Report advocated for a dominion status for India within the British Empire and called for a representative government. Some of its key features were:

1. Dominion Status: The report proposed that India be given dominion status, similar to other self-governing British colonies like Canada and Australia.

2. Federal Structure: It recommended a federal structure for India, comprising provinces and princely states, with the provinces having autonomy in their internal affairs.

3. Fundamental Rights: The report recognized the importance of fundamental rights and called for their protection in the future constitution.

4. Universal Suffrage: It advocated for adult suffrage, ensuring that all adult citizens would have the right to vote.

5. Religious and Minority Rights: The report emphasized the protection of religious and minority rights, ensuring their representation and safeguarding their cultural and educational interests.

Conclusion:
While the Constitution of India was not prepared in 1928, Motilal Nehru played a significant role in drafting the Nehru Report that proposed a constitutional framework for India. The Nehru Report became an important milestone in the process of constitutional development in the country and laid the foundation for future discussions on India's constitutional future.