The correct answer is A. Article 79 to 122 in Part V.
Part V of the Constitution of India deals with the Union Legislature. It consists of 10 articles, from Article 79 to Article 88. Article 79 states that the Union Legislature shall consist of the President and the two Houses of Parliament, namely, the Council of States and the House of the People. Article 80 deals with the composition of the Council of States, Article 81 deals with the composition of the House of the People, Article 82 deals with the number of seats allotted to each State in the Council of States, Article 83 deals with the number of seats allotted to each State in the House of the People, Article 84 deals with the qualifications for membership of Parliament, Article 85 deals with the disqualifications for membership of Parliament, Article 86 deals with the salaries and allowances of members of Parliament, Article 87 deals with the vacations of seats in Parliament, and Article 88 deals with the quorum in Parliament.
Option B, Article 36 to 51 in Part IV, deals with the Directive Principles of State Policy.
Option C, Article 152 to 237 in Part VI, deals with the Union Executive.
Option D, Article 239 to 242 in Part VII, deals with the States.