Answer: Raghunath Murmu
Notes: Raghunath Murmu invented the Ol Chiki script in 1925 for writing the Santali language. Santali became an official Indian scheduled language in 2003 and uses Ol Chiki for official communications. This script distinguishes Santali, the largest Munda language, from neighboring regional languages in Odisha, Jharkhand, and West Bengal.
