Here are the Answer keys of different coaching institutes for UPSC Preliminary Examination 2018 conducted on June 3, 2018 by UPSC. We like to thank institutes who have provided answer keys. (Answer Key courtesy: DristiIAS, GS Score, Shankar IAS)
Civil-Services-(Prelims)-Exam-2018-Answer-Key-Paper-I-(GS) by DRISTI IAS
UPSC PRELIMS GS-1 2018 ANSWER KEY BY SHANKAR IAS
IAS Preliminary 2018 General Studies Answer Key 2018 by GS SCORE