Assertion : the speedometer of an automobile measures the average speed of the automobile. reason : average velocity is equal to total displacement per total time taken. A statement of assertion (A) is given and a Corresponding statement of reason (R) is given just below it of the statements, (B) If both A and R are true but R is not the correct explanation of A. (C) If A is true but R is false. (D) If both A and R are false. (E) If A is false but R is true