What is the result of A OR B when A is false and B is true?

• A. Always true.
• B. Always false.
• C. Depends on A and B.
• D. True.

Answer: (D)

The main idea is how the OR operation works: it outputs true if at least one input is true. With A false and B true, A OR B is true because there is a true input. So the result is true. This matches the option that describes True. (If both were false, it would be false; if either is true, it stays true.)