‘Parcel’ indicates-

The answer "Dead end" is correct because "Cul-de-Sac" is a French term that literally translates to "bottom of the bag," but it is commonly used in English to refer to a street or passage that is closed at one end, meaning there is no outlet.

In urban planning, a cul-de-sac is often a residential street with a circular turn-around area at the end, making it a safe and quiet place for families, but not allowing through traffic. Thus, the term effectively means a street that leads nowhere further, which matches perfectly with the definition of a dead end.

xy = {(x + y)² - (x - y)²}/4

বা, xy = {(12)² - (2)²}/4

বা, xy = (144 - 4)/4

বা, xy = 140/4

∴ xy = 35