Unable to apply patch in Oracle Grid Home
Thanks all for your help. Here is the solution:


Do standalone installation of Grid Software on each server one by one. (Don't configure Grid now.)
Download the required patch.
Unzip the patch in temp folder and then copy and paste it to Oracle GRID_HOME\OPatch directory. Don't delete any file, if asked click on Merge.
Set the ORACLE_HOME=GRID_HOME and then after set the path of OPatch in PATH environment.
Now apply the patch by following the steps provided in README file along with patch.
Once it is done, Start the Grid configuration , hopefully you won't face any issue.