Explanation:

• The Citizenship Act, 1955 regulates who may acquire Indian citizenship and on what grounds. A person may become an Indian citizen if they are born in India or have Indian parentage or have resided in the country for a period of time, etc. However, illegal migrants are prohibited from acquiring Indian citizenship.
• An illegal migrant is a foreigner who: (i) enters the country without valid travel documents, like a passport and visa, or (ii) enters with valid documents, but stays beyond the permitted time period.