Consider the following statements about Amir Khusrau:(i) He was a disciple of the Sufi Saint Shaikh Nizamuddin Auliya.(ii) He is said to have written several treatises on music.(iii) His work Khazain-ul Futuh deals with the reign of Sultan Kaiqubad.(iv) The musical instrument Sitar is regarded as his invention.Which of the statements given above are correct? Select your answer from the codes given below:Codes:

• A. (i), (iv)
• B. (i), (ii), (iii)
• C. (i), (ii), (iv)
• D. (i), (iii), (iv)