As you have asked about the official government key of the Andhra Pradesh Engineering Agriculture, Medical Common Entrance Test (AP EAMCET) answer key for engineering, I am giving you information about it, check below for the details

Answer keys are issued by JNTU Kakinada on behalf of APSCHE
Answer key of AP EAMCET has been published.
Answer key of AP EAMCET will be helpful in assessing exam performance, and knowing correct answers of the physics, chemistry, mathematics, biology questions

Exam date April 29, 2016
AP EAMCET 2016 Key have been released on April 29, 2016
AP EAMCET 2016 Key related objections will be received till this last date May 4, 2016 (4 PM)

Answer key:
AP EAMCET - 2016
Engineering Stream
Preliminary Key

.Q. No.: Set - A
1 4
2 3
3 2
4 1

Official AP EAMCET Key