Which great society program was a comprehensive health insurance program for all senior citizens?

This would be Medicare. Keep in mine Medicaid and Medicare are similar, but two different programs not to get them mixed up. Medicare has several different parts, and the most common you will see is Medicare part A and Medicare part B. There is a difference in them as some covers for hospital visits, inpatient stays, etc. other part will pay for standard office visits right a doctor.

6, 4, 5, 1 are true. the others are false.