@ravit.thapar if filing 1040NR and if you are from India, you are not eligible to file Married Joint. File Married filing separate. If wife has no SSN (because of F2 visa); then you can claim them as dependent but write SPOUSE and put in ITIN. If no ITIN, apply for it and write 'APPLIED' in SSN field for dependent.
Also these instructions were for those filing in 2018 for 2017 income. Not sure if something changed because of new tax law starting 2019.
