Hello Nishant Prasad. Thanks for contacting Careers360 and we hope we will be able to answer your query. 

I would like to direct your attention to this link for more information about the exam pattern for JEE Advanced 2018:

• https://engineering.careers360.com/articles/jee-advanced-exam-pattern

It is expected that like the last two years, thee will be partial marking in the questions of multiple correct when you have not given all correct answers and not given one wrong answer. 

Also, please see this Quora question:

• https://www.quora.com/Will-there-be-partial-marking-in-JEE-Advanced-2018

And, here:

• http://www.jeemain.info/jee-advanced-pattern-2018/

Hope this helps you and all the best!