Answer:
The correct answer is option a. "from A to B; mostly B; insufficient information is given to predict the rate of the reaction".
Explanation:
A large negative ΔG means that the reaction A → B is thermodynamically favorable and it will occur spontaneously in normal conditions. Therefore, the reaction would proceed from A to B and at equilibrium mostly B would be present. However, a large negative ΔG value is not enough to predict the rate of reaction. Further information is needed before the rate of the reaction A → B could be defined.