The distance between the theoretical noses of crossing along the same rail, in case of diamond crossing, is

• A. <img src="/_files/images/civil-engineering/railways/59-17-147-1.png">
• B. <img src="/_files/images/civil-engineering/railways/59-17-147-2.png">
• C. <img src="/_files/images/civil-engineering/railways/59-17-147-3.png">
• D. <img src="/_files/images/civil-engineering/railways/59-17-147-4.png">