The correct answer is: B. 300
The LCN (Load Classification Number) is a measure of the structural capacity of an aircraft pavement. It is determined by the aircraft’s weight and tire pressure. The LCN of a pavement is the maximum LCN of an aircraft that can be operated on the pavement without causing damage.
The UK design criteria for aircraft pavements state that if the LCN of an aircraft is between 1.25 to 1.5 times the LCN of the pavement, then the number of movements allowed is 300. This is because the pavement is still able to withstand the load of the aircraft, but it is at a higher risk of damage.
Option A is incorrect because the number of movements allowed is not zero. Option C is incorrect because the number of movements allowed is not 3000. Option D is incorrect because the number of movements allowed is not unrestricted.