The minimum age to be a member of the Karnataka Legislative Assembly is 25 years. This is as per the Constitution of India, Article 173(1). The article states that a person shall not be qualified to be a member of the Legislative Assembly unless he is a citizen of India, not less than 25 years of age, and is enrolled as a voter in any constituency in that State.
Option A is incorrect. The minimum age to be a member of the Lok Sabha (the lower house of the Indian Parliament) is 25 years.
Option B is incorrect. The minimum age to be a member of the Rajya Sabha (the upper house of the Indian Parliament) is 30 years.
Option C is incorrect. The minimum age to be a member of the Legislative Council of a State is 30 years.
Option D is incorrect. The minimum age to be a member of the Legislative Assembly of a State is 25 years.