Pick one category for the following text. The options are - company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work. St. Mary's High School Secunderabad -  St. Mary's High School Secunderabad is a co-educational catholic school located at St. Francis Road Secunderabad Andhra Pradesh India. It is one of the oldest schools of the country. It offers schooling from L.K.G. to Standard X and is based on the syllabus of the Secondary School Certificate.
The answer to this question is:
Educational Institution