The correct answer is: A. 320
Article 320 of the Constitution of India deals with the appointment of Election Commissioners. It states that the President shall appoint Election Commissioners for the Union and for each State. The Election Commissioners shall hold office during the pleasure of the President.
The Election Commission of Union Territory of Jammu and Kashmir was appointed by the President under Article 320 of the Constitution of India. The Election Commission is responsible for conducting elections to the Legislative Assembly of the Union Territory of Jammu and Kashmir.
The other options are incorrect because they do not deal with the appointment of Election Commissioners. Article 321 deals with the powers and functions of the Election Commission. Article 323 deals with the qualifications of Election Commissioners. Article 324 deals with the removal of Election Commissioners.