The correct answer is A. Grid iron system.
A grid iron system is a type of street layout in which streets intersect at right angles to form a grid pattern. This type of layout is often used in cities with rectangular street patterns, as it is efficient and easy to navigate. Grid iron systems are also relatively safe, as they provide clear sight lines and allow for easy emergency vehicle access.
A dead end system is a type of street layout in which streets terminate at a dead end. This type of layout is often used in residential areas, as it can help to reduce traffic congestion and noise. However, dead end systems can also be dangerous, as they can create cul-de-sacs where emergency vehicles cannot access.
A ring system is a type of street layout in which streets form a series of concentric rings. This type of layout is often used in cities with circular street patterns, as it can help to reduce traffic congestion and improve air quality. However, ring systems can also be difficult to navigate, as they can create a maze of streets that can be confusing for drivers.
A radial system is a type of street layout in which streets radiate from a central point. This type of layout is often used in cities with radial street patterns, as it can help to improve traffic flow and reduce congestion. However, radial systems can also be difficult to navigate, as they can create a maze of streets that can be confusing for drivers.
In conclusion, the suitable layout of distribution system for a city with roads of rectangular pattern is A. Grid iron system.