No jain dont come under obc ,OBCs are a caste, and Jains are a religious minority.
As , religious minorities do not get reservations.
In October 2017, President of India Ram Nath Kovind notified a five-member Commission headed by Delhi High Court’s former Chief Justice G. Rohini
under Article 340 of Indian Constitution,[ to explore the idea of OBC sub-categorisation.
The National Commission for Backward Classes had recommended it in 2011 and a standing committee too had repeated this.
The committee has a three-point mandate:
To examine the “extent of inequitable distribution of benefits of reservation” among various castes and communities that come under the Central OBC list.
To work out the mechanism, criteria and parameters for the actual sub-categorisation.
The actual OBC reservation will continue to be 27% and within this the committee will have to do the re-arranging.
Bringing order to the Central list of OBCs by removing any repetitions.
The committee will have to deliver the report in 12 weeks of its constitution.
The lower OBCs form around 35% of the population in Uttar Pradesh. OBC sub-categorisation have already been implemented at State level by 11 states : West Bengal, Tamil Nadu, Maharashtra, Andhra Pradesh, Telangana, Karnataka, Jharkhand, Bihar, Jammu and kashmir region and Haryana, and the union territory of Puducherry. The term of the commission has been extended to 31 May 2019. Its report stated that prime beneficiaries of 97% OBC reservation includes Yadav, Kurmi, Jat (Jats of Rajasthan except those of Bharatpur and Dholpur district are in Central OBC list), Saini, Thevar, Ezhava and Vokkaliga castes.
Reference: Article 340 of Indian Constitution