In becoming a disciple of Baba, Ravi Shankar also became a member of the highly famed and influential "family" or "school" of raga study and performance known as the , of which Baba himself was the founder.

Maihar Gharana.

Explanation:

The Maihar Gharana is the school in which Hindustani classical music is taught. The Gharana was originated by Ustad Allaudin Khan also known as Baba.

Allaudin's interest in music was kindled in childhood when his elder brother, Fakir Aftabuddin, taught him music at home. After this, he learned various musical instruments with the desire of becoming an instrumentalist. Ustad Allaudin Khan was the court musician in the courts of Brijnath Singh Maharaja of Maihar Estate. The Maihar Gharana was established in the 19th century originated by Baba.

Ravi Shankar was the son-in-law of Baba, who became his disciple.

So, the correct answer is Maihar Gharana.