There are two statements marked as Assertion (A) and Reason (R). Mark your answer as per the options given below.

Assertion (A):  Efficiency Ratios are indicators of the efficient use of resources by a firm.
Reason (R):  Activity Ratios, i.e., Inventory Turnover Ratio, Trade Receivables Turnover Ratio, etc are the ratios that show how effectively the resources of the firm were used during the year.

Both, Assertion (A) and Reason (R) are correct and Reason (R) is the correct explanation of Assertion (A).

Activity (or Turnover) Ratio -These ratios indicate the speed at which, activities of the business are being performed. The activity ratios express the number of times assets employed, or, for that matter, any constituent of assets, is turned into sales during an accounting period. Higher turnover ratio means better utilisation of assets and signifies improved efficiency and profitability, and as such are known as efficiency ratios. The important activity ratios calculated under this category are-
1. Inventory Turnover; 2. Trade receivable Turnover; 3. Trade payable Turnover; 4. Investment (Net assets) Turnover 5. Fixed assets Turnover; and 6. Working capital Turnover