74: In an open economy, the national income (Y) of the economy is :
If C, I, G, X, M stand for Consumption, Investment, Govt. Expenditure, total exports and total imports respectively.
(a) Y = C + I + G + X
(b) Y = C + I + G - X + M
(c) Y = C + I + G + (X - M)
(d) Y = C + I - G + X - M