Just realized they also are very close to not meeting their RO if they only stay in Canada in for 4 months if they have already been outside of Canada for 2 years.
Would add that if you attempt to use theirOHIP even though they don’t qualify you can asked to payback the money for many years after the fact when they audit the information. Their options are to stay longer or pay for care. Given their 2 year absence they may have to stay 6 months. It will depend On how long theyhave been in Canada before going away for 2 years and how much time they remained in Canada during the many years before the 2 years and it depends on whether they left for over 2 years or less than 2 years. Access to healthcare is dependent on your being present in Canada for a certain amount of time. Your parents seem to be trying to visit the dentist, the doctors and attempting to access healthcare before going back to India. The residency rules are in place to prevent exactly this situation.