Given a set of five words, generate the word from the set that does not belong (i.e. is the least relevant) with the other words. Words are separated by commas.

Q: slow, shut, close, beside, out of service

A: beside
****
Q: duck, get down, fall, stoop, cow

A: cow
****
Q: capacitance, vitamin c, fat, pasty, angular momentum

A:
vitamin c
****