The first effective antibacterial agent prepared was

Options

A. prontosil
B. alizarin
C. phenolphthalein
D. methyl orange

Answer

A

Explanation

The bright red dye that became the first sulphonamide drug to to treat bacterial infection was prontosil. It resembles in structure to the compound, salvarsan. It must be noted that in the body prontosil is cnverted to a compound called sulphaniamide, which is the real active compound.