Hello Student

Yes you are eligible for appearing in NEET exam though you are lefty.   You are lefty because you have no right thumb. As general category student eligible for getting reservation of gel PWD category.if you have 50% marks in 12th class examination with physics chemistry biology and English and if you attend the age of 17 years at east on the appearing year then you are eligible for appearing the Neet exam although you are Lefty. Ganit appearing eligibility rules mention that up to 70% locomotor disability e accepted for appearing Neet exam taken by National Testing Agency.

Hope this helps.