The below question is a dump CRM exam question. I have reproduced the question on CRM online and it seems that the answer should be 3. But according to the dump paper, it is 2.
Here is the question:
You are creating a business rule for the account records. The business rule will perform an action if the record has Country set to the United States and City set to either Redmond or San Francisco. You need to identify the minimum number of condition sets required to implement this logic. What should you identify? A. 1 B. 2 C. 3 D. 4
Here's a link that may help you.
Best Practices for Business Rules in Microsoft Dynamics 365 - CRM Software Blog | Dynamics 365