Step 1: Concept Overview:
The question seeks the scientist recognized as the "father" of Indian paleobotany (the study of fossil plants).
Step 2: Explanation:
Professor Birbal Sahni (1891–1949) was a distinguished Indian paleobotanist.
He significantly advanced the understanding of the Indian subcontinent's fossil flora, contributing to knowledge of its paleogeography and geology.
In 1946, he established the Institute of Palaeobotany in Lucknow, later renamed the Birbal Sahni Institute of Palaeosciences in his memory.
His groundbreaking research and extensive contributions have earned him the title of "Father of Indian Paleobotany."
The other individuals mentioned are not paleobotanists. Bhishma Sahni was a noted Hindi author, and Balraj Sahni was a well-known actor; both were Birbal Sahni's brothers.
Step 3: Answer:
Professor Birbal Sahni is considered the father of paleobotany in India.