I am not quite sure whose marital status you refer to, but..... If your grandfather died you would indicate "deceased". Your grandmother would be "widowed". Does that make sense in this situation? I don't have the form in front of me for reference. Have you looked at that question in The GUIDE for an answer? Good Luck.
Think I've found the form you are looking at and this is the Guide reference. Hope this helps. http://www.cic.gc.ca/english/information/applications/guides/5256ETOC.asp#5256E4
"Write full name, relationship, date of birth, marital status (married, single, widowed, common-law, divorced, separated, annulled marriage), present address and occupation (job), and whether they will come with you to Canada by checking ‘‘Yes’’ or ‘‘No’’.
If a person is deceased, indicate this under ‘‘Present address’’, and write the city and the date they died. "
I am going to apply for a student visa and I have few doubts about Family Information Application form.
Both my mom and dad had passed away a few years back and I don't have clear evidence which can be shown as the proof of their DOB. So my parents' DOB which I know I will put there but should I mention "LATE" before their names to inform that they are no more.
Also, any other concern regarding this which I should have clarified beforehand else which might be an issue later?