Drug a Has a Toxic Dose of 17 G/kg of Body

Drug A has a toxic dose of 17 g/kg of body weight and a therapeutic dose of 8 g/kg of body weight.Drug B has a toxic dose of 6 g/kg of body weight and a therapeutic dose of 4 g/kg of body weight.Which of the following statements is true?

A) Drug B is the safer drug.
B) Drug A is the safer drug.
C) Drug B has a higher therapeutic index.
D) Drug A has a lower therapeutic index.