Out of the four alternatives, choose the one which can be substituted for the given words/sentences and click the button corresponding to it. One who listens secretly to private conversation
In 1849 Honest Abe invented a method to aid ships that got stuck on sandbars. He called it A Device for Buoying Vessels Over Shoals. It was never used.
Correct Answer: Change in quantity of money - change in rate of interest - change in investment - change in employment and output - change in price level
8. Deep blue colour is imparted to glass by the presence of