The Vital-Vidhvansak, the first monthly journal to have the untouchable people as its target audience was published by

1. A

   Gopal Baba Walangkar

   Gopal Baba Walangkar. Vital-Vidhvansak (1888), aimed at ‘untouchable’ readers.

2. B

   Jyotiba Phule

   Phule. Gulamgiri and Satyashodhak; not this monthly.

3. C

   Mohandas Karamchand Gandhi

   Gandhi. Harijan is decades later.

4. D

   Bhimrao Ramji Ambedkar

   Ambedkar. Mooknayak / Bahishkrit Bharat, not Vital-Vidhvansak.

Summary. Official key is (a). Vital-Vidhvansak, the first monthly aimed at untouchable readers, was brought out by Gopal Baba Walangkar, a Mahar pioneer before Phule’s later heirs and Ambedkar’s papers.