Answer:
Option b. A and B are conditionally independent given C2.
Explanation:
The conditional probability of an event is the probability that a given event will occur given that another event, say A has already occurred.
In a case where events A and B are independent (in this case, where the probability of A has no effect on the probability of B occurring), the conditional probability of an event B given that A has taken place is simply the probability of the event A.
If the two events are not independent, then the probability of an event occurs as an intersection of set A and B.
