Colleges in Andhra Pradesh

Yes, but make sure that by qualifying in AUEET you are going to dual degree course. Anyway, I think there is a provision for quitting the course after completing your 8th semester and to get a B.Tech certificate. But be sure about it. It's better to contact AU admissions desk for more information.

You might have a chance if you have any reservation criteria else give it a try. You have very great chances to get into this institute with this rank.
Attend the counselling and choose your options appropriately.

Yes, of course. You can get a seat in CSE branch even in Visakhapatnam campus with your rank.
Tuition fee=2,42,000/-
Special fee=30,200/- per an academic year.

For a good career in management (PhD) I would like to suggest you to go for Fellow Programme in Management (FPM) at the reputed Indian Institute of Management (IIMs), XLRI, MDI, IRMA and similar institutes.

AP-EAMCET 2018 college predictor:
Use your AP-EAMCET 2018 rank to see where you can get admission at the link provided below:
See the courses, colleges and rounds you may crack.
The result is based on admissions data of AP-EAMCET 2017.
Get resources and insights on colleges and courses.
https://www.shiksha.com/b-tech/resources/ap-eamcet-college-predictor

AP-EAMCET 2018 College Predictor:
Use your AP-EAMCET 2018 rank to see where you can get admission at the link provided below:
See the courses, colleges & rounds you may crack
The result is based on admissions data of AP-EAMCET 2017
Get resources & insights on colleges & courses. Regards
https://www.shiksha.com/b-tech/resources/ap-eamcet-college-predictor

Andhra Pradesh-EAMCET 2018 College Predictor
Use your Andhra Pradesh-EAMCET 2018 rank to see where you can get admission at the link provided below:
See the courses, colleges & rounds you may crack. The result is based on admissions data of Andhra Pradesh-EAMCET 2017. Get resources & insights on colleges & courses. Regards. https://www.shiksha.com/b-tech/resources/ap-eamcet-college-predictor.

For admission in MA English you need to have minimum 50% to get admission.