HI,

 Based on the rank you can try for following colleges with oc category :( if you mention the catergory we could help  more specific in which you want to take admission in):

coming to mba or mca ,it depends on the area of ones interest, both have its own advantages 

personally i feel doing MBA In bschool or IIMS have more value 

colleges you can opt are:

RVR and JC College of Engineering

 Sri Vidyaniketan Institute of Management--Tirupathi -

Andhra Loyola Institute of Engineering And Tech Vijayawada , Krishna District.

PB Sidhartha college of arts and science--vijayawada

Sri Krishnadevaraya University 

Rajeev Gandhi Memorial College of Engineering and Technology Nandyal - [RGMCET], Kurnool

Vignans Institute of Information Technology---VISHAKAPATNAM

SRK Institute of Technology, Vijayawada

GOOD LUCK