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: sergeant, general, standard, plain, ordinary

A: sergeant
****
Q: fawn, social, cub, kid, colt

A: social
****
Q: format, folder, file, schedule appointments, firewall

A:
schedule appointments
****