Explanation:

The doctrine of res judicata, enshrined in Section 11 of the Code of Civil Procedure, 1908, is founded on two fundamental maxims: 1. *Interest republicae ut sit finis litium*: It is in the interest of the state that there should be an end to litigation. 2. *Nemo debet bis vexari pro una et eadem causa*: No one ought to be vexed twice for one and the same cause. Therefore, both (A) and (B) are the maxims on which the doctrine is based.