Pick up the correct statement from the following:

• Approach zone survey is carried out to determine the elevations of the protruding obstructions above horizontal, conical and transitional surfaces
• The wind data of an air port is depicted in the form of a chart known as wind rose
• The landing and take off of the air craft is made against the wind direction
• The product of wind loading and power loading is called air craft rating
• All the above.