Who was the founder of Benaras Gharana of Kathak?

The correct option is Janaki Prasad.

Step-by-step Explanation:
1. Understanding Kathak Gharanas: Kathak, a major classical dance form of India, is characterized by different schoolings or schools of training, known as "Gharanas". The major Gharanas of Kathak are Lucknow, Jaipur, Banaras, and Raigarh.
2. The Banaras Gharana: The Banaras Gharana (also spelled Benaras Gharana) of Kathak was founded by Janaki Prasad. He was a dancer and musician who belonged to Bikaner but settled in Varanasi (Banaras), where he established this unique style of Kathak.
3. Key Characteristics: The Banaras Gharana is known for its graceful usage of natwari bols (dance syllables representing Krishna's steps) rather than tabla or pakhawaj bols. It emphasizes purity of movements, precision in footwork, and a distinctive grace.
4. Analyzing Other Options:
- Ishwari Prasad is associated with the origin and early lineage of the Lucknow Gharana.
- Shambhu Maharaj was a legendary exponent of the Lucknow Gharana.
- Raja Chakradhar Singh was the patron and developer of the Raigarh Gharana.