Assertion: The Indian constitution follows the ethics of 'unity in universality'.
Reason: The Indian nation shall not deny the rights of different regions and linguistic groups to retain their own culture.

The Assertion is incorrect but the Reason is correct.

Indian constitution follows the ethics of unity in diversity.

In studying the Indian Constitution and the process of nation-building we have repeatedly come across one basic principle of the Indian approach to diversity – the Indian nation shall not deny the rights of different regions and linguistic groups to retain their own culture. We decided to live a united social life without losing the distinctiveness of the numerous cultures that constituted it. Indian nationalism sought to balance the principles of unity and diversity. The nation would not mean the negation of the region. In this sense the Indian approach was very different from the one adopted in many European countries where they saw cultural diversity as a threat to the nation. India adopted a democratic approach to the question of diversity. Democracy allows the political expressions of regional aspirations and does not look upon them as anti-national. Besides, democratic politics allows parties and groups to address the people on the basis of their regional identity, aspiration and specific regional problems.