Correct Answer : Option (A) - 1 only
Note :
A single citizenship means that all Indians irrespective of their State of Domicile are the Citizens of India. In India, A person born in Punjab or kerala can only be a citizen of India and not a citizen of the State of their domicile like in the USA. So, statement 1 is correct.
In India a citizen whether by birth, registration, naturalization or descent can become President. In USA only natural-born citizen of the United States can become President. So, statement 2 is not correct.
The person who obtains Indian citizenship by birth, by domicile and by incorporation of territory can never be deprived of their citizenship. Only person who have got the citizenship by naturalisation and registration can be deprived of it under following circumstances:
1) obtained the citizenship by fraud
2) shown disloyalty to the Constitution of India
3) unlawfully traded or communicated with the enemy during a war
4) within five years after registration or naturalisation, been imprisoned in any country for two years and
5) has been ordinarily resident out of India for seven years continuously. So, statement 3 is not correct.