एक इमारत के चारों ओर प्रदान किए जाने वाले मानक खुले स्थान को क्या कहा जाता है?

The ratio of the total covered area of all floors to the total plot area on which the building is constructed is known as:

According to standard building bye-laws and National Building Code guidelines, what should be the minimum open distance maintained between two adjacent buildings to ensure proper ventilation and safety?