Which list represents the sequence of social positions in the feudal hierarchy (starting from the uppermost tier)?

 king, lord, clergy, knight, serf 

During the 8th to 14th century, the feudal system was the prominent governmental custom. It was mostly in the European countries during these ancient eras. This feudal system is composed of a social hierarchy on where people or some like a pyramidal model, which is at the top and at the bottom of the social structure/class. Here, it the feudal hierarchy system consults one’s privileges and rights to a certain class, mostly are given to the top class or the ones belonging near the pinnacle of this pyramid.