Which sentence contains a noun which is in the incorrect form?
"there are people who laugh at the horse that would not dare to laugh at
the master cried the young would-be musketeer.
"i do not often laugh, sir, replied the stranger, as you may see by the
expression of my face, but nevertheless i retain the privilege of laughing
when i ."
"and i cried d'artagnan, will allow no man to laugh when it
me! "
and the stranger, muttering to himselves, directed his steps toward the
kitchen