In my opinion VVIT is better than all you have listed. You can make your choice going through Information below.

VVIT: Placement: The college provides good placements. Many companies like Infosys, Capgemini, NTT Data, etc., offer placements in our college. 

VVIT: Placements in the college are  package ofexcellent.The average salary offered was nearly 4 LPA. Many good companies like TCS, Wipro, etc., visit the campus for placement drives.

KHIT: Students with an aggregate of 75% and above are provided with better placement opportunities. Companies like Wipro, Dell, TATA, HP, TATA Steels, etc., are invited to the campus, and the college is yet to increase its standards in the coming years.

NEC: Placements: Narasaraopet Engineering College provides very good placements to its students. The college provides good jobs for students. The college also provides internships for the students.