Admissions committees pay close attention to GRE scores, which should average above 500 in each category. Of course, grades and GRE scores can never be too high. All universities have had bad experiences with students whose English is not adequate. Indian, may be a barrier. Universities ask for a Statement of Purpose to see if the applicant really wants to pursue a career in public administration.
Evidence is undergraduate courses in the field and previous employment.
International applicants are often ineffective in their letters of recommendation. Although most schools ask for three, sending more is a good idea. Admissions committees discount praise of the applicant, which is usually effusive. They do appreciate clarification of the student's commitment to a career in public administration and assessment of skill in English. Those who have worked for governmental or non-profit agencies should solicit a letter from their supervisor.