In a share based payment transaction where the entity has settlement choice, which of the following statements is true: O a. If an entity elects to settle in cash the settlement is accounted for as an expense O b. The entity has a present obli on to settle in cash where it has a past practice or stated policy of settling in cash O c. The entity must settle in equity unless there is no commercial substance to the transaction O d. Where a present obligation does not exist the entity has a choice of cdassification as an equity or cash settled share based payment transaction