Read the following statements - Assertion (A) and Reason (R)carefully and choose the correct alternative given below:
Assertion (A) :The economy attains equilibrium at a point where the saving curve intersects the investment curve .
Reason (R ):At the level of full employment equilibrium , actual level of Aggregate Demand must be equal to the required level of Aggregate Demand

 Both Assertion (A) and Reason (R ) are true and Reason(R) is not the correct explanation of Assertion (A)

According to Keynesian theory, equilibrium is determined in terms of Aggregate demand and Aggregate supply. Income and employment are in equilibrium at that level at which AD=AS. 

Equilibrium can be determined through S and I approach. 

Since, AD = C + I and AS = C + S

We know equilibrium is when AD = AS, so C + I = C + S

Therefore, I = S