Redeemable debts are those that must be repaid at a specific future date, typically with interest. This term is used for debts that are not perpetual and must be settled at a predetermined time. Thus, the correct answer is (a).
For a hypothetical economy, assume the government increased infrastructural investment by ₹10,000 crore. 80% of additional income is consumed in the economy. Estimate the increase in income and the corresponding increase in consumption expenditure in the economy.