The correct answer is (a) Name of medicine
For explanation: A prescription has 3 parts. The 1^st part contains the name of the medicine, formulation which is to be taken, strength of the medicine that is to be taken. For example, if the prescription is for amoxicillin the 1^st part will be Rx or recipe Amoxicillin caps 500 mg. in the 2^nd part more details of how to take the medicine will be given.