Correct option is A
Contraction joints: - The primary purpose of transverse contraction joints is to control cracking caused by tensile and bending stresses in concrete slabs due to the cement hydration process, traffic loads, and the environment
Expansion joints: - is the joints able to safely absorb expansion or contraction at some extent cause due to weather or temperature effect.
Construction joint: - Construction joints are provided whenever the construction work stops temporarily. The joint direction could be either along the transverse or longitudinal direction.
