The correct answer is C.
The President addresses both the Houses of Parliament assembled together at the first session after each general election and the first session of each year. This is in accordance with Article 85 of the Constitution of India.
Option A is incorrect because the President addresses both the Houses of Parliament assembled together only on two occasions, as mentioned above.
Option B is incorrect because the President does not address both the Houses of Parliament assembled together every session.
Option D is incorrect because the President addresses both the Houses of Parliament assembled together only on two occasions, as mentioned above.