The correct answer is Ustad Amir Khan.

• Indore Gharana is one of the vocal Gharanas of Indian classical music which was founded by Amir Khan.
• The performance of the Indore Gharana is noted by the vilambit tempo in the style of Abdul Wahid Khan, and the taans reminiscent of Rajab Ali Khan.
• Some of the noted vocalist and disciples of Amir Khan are Pandith Amarnath, Shankar Lal Mishra, Kankana Banerjee, Purvi Mukherjee, etc.
• The famous musician Sultan Khan (Sarangi player) developed his music under Indore Gharana.

• Gharana is a system in which people organize socially that links musicians and dancers.
• It is an apprenticeship or lineage, for the adherence to a particular musical style. 
• The word Gharana originates from the Urdu/Hindi word ‘Ghar’, which means ‘house’ or Family.
• A Gharana also indicates a comprehensive musicological ideology and differentiates one school from another.
• Some of the Gharanas well known for singing Hindustani classical music are Agra, Gwalior, Indore, Jaipur, Kirana, and Patiala.