Both A and R are true and R is the correct explanation of A

Both A and R are true and R is not the correct explanation of A

A is true but R is false.

A is false but R is true.

1 aircraft per hour

2 aircrafts per hour

4 aircrafts per hour

16 aircrafts per hour

weather conditions and navigational aids available

lateral spacing between two runways and weather conditions

lateral spacing between two runways and navigational aids available

lateral spacing between two runways, weather conditions and navigational aids available.

only clearway

only stop way,

either a clearway or a stopway

either a clearway or a stopway or both

50 m

100 m

150 m

250 m