The correct answer is A. 1st July, 1963.
The Territorial Council of Himachal Pradesh was converted to Legislative Assembly on 1st July, 1963. The Legislative Assembly is the unicameral legislature of the Indian state of Himachal Pradesh. It consists of 68 members, directly elected from single-member constituencies. The term of the Legislative Assembly is five years.
The Legislative Assembly is responsible for making laws for the state of Himachal Pradesh. It also has the power to approve the budget of the state and to oversee the functioning of the government. The Speaker of the Legislative Assembly is the presiding officer of the House.
The Legislative Assembly is a powerful institution in the state of Himachal Pradesh. It plays a vital role in the governance of the state.
Option B is incorrect because the Territorial Council of Himachal Pradesh was converted to Legislative Assembly on 1st July, 1963, not 1st July, 1961.
Option C is incorrect because the Territorial Council of Himachal Pradesh was converted to Legislative Assembly on 1st July, 1963, not 1st July, 1956.
Option D is incorrect because the Territorial Council of Himachal Pradesh was converted to Legislative Assembly on 1st July, 1963, not 1st July, 1751.