A. The building has two ends and two doors B. The building has two ends, but only one door C. The building has two ends, but I do not know which of the two has a door D. The building has many ending each and for all
Correct Answer: A
Explanation
Either as used before the first of two given alternatives. When it is used as a determiner, it refers to both choices or possibilities This means that there are two alternatives. At each end of the building, there is a door. Either is used only when there are two persons or things. The statement can be interpreted as ''There are two ends in the building, and each of the ends has a door.
