Assertion: A body with constant acceleration always moves along a straight line. Reason: A body with constant acceleration may not speed up. Which of the following options is correct?
(1) Both assertion and reason are true and reason is the correct explanation of the assertion.
(2) Both assertion and reason are true but reason is not the correct explanation of the assertion.
(3) Assertion is true but reason is false.
(4) Assertion is false but reason is true.