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Central Secretariat Service ( CSS ) is one of the administrative civil service under Grade A and Grade B of the Central Civil Services of the executive branch of the Government of the Republic of India .
 Government of the Republic of India
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Government of the Republic of India