The correct answer is: A. Article 172
Article 172 of the Constitution of India deals with the qualifications for members of the Legislative Assembly of a State. It states that a person shall not be qualified to be a member of the Legislative Assembly unless he:
(a) is a citizen of India;
(b) has completed the age of 25 years;
(c) is, in the opinion of the Election Commission, not disqualified on the ground of unsoundness of mind or infirmity of body or addiction to alcohol or drugs; and
(d) is not a member of the Union Parliament or the Legislative Assembly or Legislative Council of any other State.
The other options are incorrect because they do not deal with the qualifications for members of the Legislative Assembly. Article 173 deals with the composition of the Legislative Assembly, Article 174 deals with the powers, privileges and immunities of the Legislative Assembly, and Article 175 deals with the procedure for the transaction of business in the Legislative Assembly.