According to the International Civil Aviation Organization (I.C.A.O.) the strength of runway pavements, have been coded by A. Seven English alphabets B. Last Seven English alphabets C. First Seven English alphabets D. First seven numbers

The correct answer is: A. Seven English alphabets

The International Civil Aviation Organization (ICAO) has coded the strength of runway pavements using seven English alphabets, from A to G. The strength of a runway pavement is determined by its ability to support the weight of aircraft. The higher the letter grade, the stronger the pavement.

Pavements with a strength of A are the strongest and can support the heaviest aircraft. Pavement with a strength of G are the weakest and can only support the lightest aircraft.

The ICAO pavement strength code is used by airports around the world to ensure that runways are able to safely support the aircraft that use them.

Here is a brief explanation of each option:

• Option A: Seven English alphabets. This is the correct answer. The ICAO pavement strength code uses seven English alphabets, from A to G.
• Option B: Last Seven English alphabets. This is incorrect. The ICAO pavement strength code does not use the last seven English alphabets.
• Option C: First Seven English alphabets. This is incorrect. The ICAO pavement strength code does not use the first seven English alphabets.
• Option D: First seven numbers. This is incorrect. The ICAO pavement strength code does not use the first seven numbers.