The correct option is 1 only, as India recognizes only one citizenship for all its citizens, which means that a person cannot hold dual citizenship. Statement 2 is incorrect because, while the President of India (Head of State) must be a citizen by birth, there are other provisions that allow citizens by descent and naturalization to become eligible for certain positions. Statement 3 is also false as the Constitution allows for the deprivation of citizenship under specific circumstances, such as disloyalty to the state or acquired citizenship in another country. Thus, understanding citizenship and its legal ramifications is crucial for grasping the broader principles of nationality and governance in India, which is relevant for UPSC aspirants.