Why can't a person be considered a citizen of India if he or she voluntarily acquires citizenship of a foreign state?
According to the context provided, a person cannot be considered a citizen of India if he or she voluntarily acquires citizenship of a foreign state because it is explicitly stated in Article 9 that "No person shall be a citizen of India by virtue of article 5, or be deemed to be a citizen of India by virtue of article 6 or article 8, if he has voluntarily acquired the citizenship of any foreign State."