Answer (a)
Total Factor Productivity
Total Factor Productivity shows the Total factor productivity (TFP) is a measure of productivity calculated by dividing economy-wide total production by the weighted average of inputs i.e. labor and capital. It represents growth in real output which is in excess of the growth in inputs such as labor and capital.
Productivity is a measure of the relationship between outputs (total product) and inputs. Factors of production are labour, capital, labour and entrepreneurship.