समष्टि आर्थिक गुणकों और सीमांत प्रवृत्तियों के संबंध में निम्नलिखित में से कौन सी सीमा (रेंज) सही नहीं है? (जहाँ MPC = उपभोग की सीमांत प्रवृत्ति, MPS = बचत की सीमांत प्रवृत्ति, और K = निवेश गुणक)

In Keynesian economic theory, investment demand is primarily determined by:

Which of the following statements are true in relation to Keynesian theory of income and employment determination? a) In the Keynesian model, the aggregate supply curve is perfectly elastic up to the level of full employment. b) The Keynesian model assumed that the marginal product of labour is constant up to the level of full employment. c) The Keynesian model assumed that the money wage rate is not constant. d) In the Keynesian model, the aggregate supply curve is unit elastic up to the level of full employment.