Final answer:
Secular music in medieval court life did not serve as religious worship, as it was meant for entertainment, courtly love celebrations, and ceremonial events, unlike sacred music which was used for religious purposes.
Step-by-step explanation:
The function of secular music in medieval court life that was NOT a function is B. Religious worship. Secular music, by definition, was independent of churches and was used for entertainment, courtly love celebrations, and ceremonial events. Religious worship, on the other hand, was served by sacred music such as Gregorian chant and other liturgical forms, not secular music. The secular music of the time included a variety of genres such as the German Lied, Italian frottola, French chanson, and the Italian madrigal, all of which were meant for non-religious contexts.