The correct answer is: A. 25 minutes.
The turning out time of an MRV Spl. When in is kept in one exit siding is 25 minutes. This is because the MRV Spl. is a long train and it takes time to move it from one track to another. The train also has to be turned around so that it can head back in the opposite direction. This all takes time, which is why the turning out time is 25 minutes.
Option B is incorrect because it is too short. The MRV Spl. is a long train and it takes time to move it from one track to another. The train also has to be turned around so that it can head back in the opposite direction. This all takes time, which is why the turning out time is 25 minutes.
Option C is incorrect because it is too long. The MRV Spl. is a long train but it does not take 20 minutes to move it from one track to another. The train also has to be turned around so that it can head back in the opposite direction. This all takes time, which is why the turning out time is 25 minutes.
Option D is incorrect because it is not an option. The turning out time of an MRV Spl. When in is kept in one exit siding is 25 minutes.