Assertion and Reason.
Assertion (A): When a very hot liquid is poured into a thick glass tumbler it cracks.
Reason (R): Unequal expansion of inner and outer glass walls causes the glass to crack.
Mark the correct choice as
(a) Both A and R are true but R is the correct explanation of assertion.
(b) Both A and R are true but R is not correct explanation of assertion.
(c) A is true but R is false.
(d) A is false but R is true.
