Assertion: In a region, where uniform electric field exists, the net charge within volume of any size is zero.
Reason: The electric flux within any closed surface in a region of uniform electric field is zero.
Options:
(a) Both A and R are true and R is the correct explanation of A.
(b) Both A and R are true but R is not the correct explanation of A.
(c) A is true but R is false.
(d) A is false and R is also false.