The question below comprises four scattered segments of a paragraph. Identify from among the four choices the sequences that correctly assemble the segments and complete the paragraph.

1. The Kitab-i-Nauras, a collection of songs in praise of Hindu deities and Muslim saints, was written by a seventeenth century ruler Ibrahim Adil Shah II.
2. Most of the words and themes of the Indian classical music have been derived from Hindu mythology but some of the greatest masters of this music have been Muslims.
3. And this great ruler’s writings have contributed much to the Hindusthani genre.
4. The growth of Indian classical music has been a major force of India's cultural unity.