(d) Assertion (A) is false and Reason (R) is true.
Explanation:
Assertion (A): The point O(0,0) lies in quadrant I. This is a false statement, as point O is the origin where two axes intersect each other.
Reason (R): The point O(0, 0) lies on both the axes. This is a true statement.
Hence, assertion (A) is false and reason (R) is true.
So, the correct answer is (d).