Heyy Dinesh Swarnakar.....

The official answer key of GATE 2019 will be released by IIT Madras in the third week of February. After that there will a window made for challenging the answer key and for that you'll have to pay 500 ₹ , so wait till that period is made open for more information.

The candidates can contest/challenge the answer key of any question after giving their justification and a payment of Rs. 500 (for each question) through the online payment link available in the GOAPS. Contests will be considered only if the payment is completed successfully. Payment for a challenge that is accepted will be refunded.

While challenging the answer keys, the candidates should ensure that the question number is as per the PDF file of the question paper uploaded on the GATE 2018 website. A preview of the question selected is also shown in the contest portal. Make sure that you select the right section and the question number which you wish to contest. Please note that if the question number is not correctly identified, then the challenge will not be considered. If you are uploading any supporting document for the contest, you must mention the section name and question number in the document.