A Nasty Fall Results in a Gash in Your Forehead

A nasty fall results in a gash in your forehead and chin,a broken nose,and several knocked out front teeth.Your friend picks you from at the emergency room and takes you to a pharmacy to fill your pain medication prescription.He notices that your prescription is for Tylenol 4 and wonders how that differs from Tylenol 2,which was prescribed for him after he had a tooth pulled.Although the excruciating pain has left you in a daze,you correctly explain that ____.

A) Tylenol 4 has twice as much acetaminophen as Tylenol 2
B) Tylenol 4 has more codeine than Tylenol 2
C) Tylenol 2 is the second version of Tylenol and Tylenol 4 is the fourth
D) Tylenol 2 has less acetaminophen in it