Well, normally, that could be accepted but not in India-Pakistan case.
For example, the Indian e-visa website has a
Family Details Section stating:
Were your Grandfather/ Grandmother (paternal/maternal) Pakistan Nationals or Belong to Pakistan held area? If the answer is yes for any of the applicant’s grandparent’s, enter the details
https://india.travisa.com/indian_VisaGuide.aspx?PartnerID=TA&CountryID=IN
So, as per the standards set by the Indian Government itself, Nikki Randhawa will be considered "of Indian Background/Origin" regardless of where she was born or what nationality she holds currently.