The correct answer is A. 24.
The Legislative Assembly of the Union Territory of Jammu and Kashmir has a total of 83 seats, of which 43 are reserved for Jammu, 37 for Kashmir, and 3 for Ladakh. The remaining 3 seats are reserved for Pakistan-occupied Kashmir (PoK). However, as PoK is under the control of Pakistan, these seats remain vacant.
Option B is incorrect because it states that 25 seats remain vacant. This is incorrect because the total number of seats in the Legislative Assembly is 83, and 25 is not a factor of 83.
Option C is incorrect because it states that 30 seats remain vacant. This is incorrect because the total number of seats in the Legislative Assembly is 83, and 30 is not a factor of 83.
Option D is incorrect because it states that 40 seats remain vacant. This is incorrect because the total number of seats in the Legislative Assembly is 83, and 40 is not a factor of 83.