CREATE TABLE table_name_12 (became_acharya_on VARCHAR2, name_of_acharya VARCHAR2)

When did acharya shree koshalendraprasadji maharaj become acharya?
SELECT became_acharya_on FROM table_name_12 WHERE name_of_acharya = "acharya shree koshalendraprasadji maharaj"
SELECT "became_acharya_on" FROM "table_name_12" WHERE "acharya shree koshalendraprasadji maharaj" = "name_of_acharya"