(A) : The sum of all internal angles in a pentagon is 540°
(R) : A pentagon has 5 sides

A

if both (A) and (R ) are true and (R) is the correct explanation of (A)

B

if both (A) and (R ) are true and (R) is not the correct explanation of (A)

C

if (A) is true but (R) is false

D

if (A) is false but (R) is true