Modified lower quadrant signaling may be introduced only with section of A. Railway Board B. CRS C. GM D. None of these

The correct answer is: A. Railway Board

Modified lower quadrant signaling is a type of railway signaling system that is used to control the movement of trains. It is a more advanced system than the traditional lower quadrant signaling system, and it offers a number of advantages, including increased safety and efficiency.

Modified lower quadrant signaling can only be introduced with the approval of the Railway Board. The Railway Board is the highest authority in the Indian Railways, and it is responsible for all aspects of railway operations, including signaling.

The other options are incorrect because they do not have the authority to introduce modified lower quadrant signaling.

• CRS stands for Chief Railway Safety Officer. The CRS is responsible for ensuring the safety of railway operations. However, the CRS does not have the authority to introduce modified lower quadrant signaling.
• GM stands for General Manager. The GM is the head of a railway zone. The GM is responsible for the day-to-day operations of a railway zone. However, the GM does not have the authority to introduce modified lower quadrant signaling.
• None of these is also incorrect because modified lower quadrant signaling can only be introduced with the approval of the Railway Board.