The correct answer is: A. Pandit Raghunath Murmu.
Pandit Raghunath Murmu was a Santali scholar and linguist who invented the Ol Chiki script in 1925. He was born in 1888 in the village of Sarenga in the present-day state of Jharkhand, India. He was educated at the Ranchi Mission School and the Calcutta University. He worked as a teacher and a headmaster in various schools in Jharkhand. He was also a member of the Santal Sahitya Akademi.
Pandit Raghunath Murmu was inspired to create a script for the Santali language after he saw the difficulties that Santali people faced in learning and using the Bengali script. He believed that a script that was specifically designed for the Santali language would make it easier for Santali people to learn to read and write.
Pandit Raghunath Murmu began working on the Ol Chiki script in 1925. He spent several years developing the script and testing it with Santali people. The Ol Chiki script was officially adopted by the Santali Sahitya Akademi in 1928.
The Ol Chiki script is a phonetic script, which means that each letter represents a sound. This makes it relatively easy to learn and use. The Ol Chiki script is also a versatile script, which means that it can be used to write a variety of genres of literature, including poetry, fiction, and non-fiction.
The Ol Chiki script has been widely adopted by Santali people. It is used in schools, government offices, and other public places. It is also used in literature and other creative works. The Ol Chiki script has played a significant role in the development of the Santali language and culture.
The other options are incorrect because they are not the names of the person who invented the Ol Chiki script.