Maximum growth rate occurs in
A. Stationary phase - This is the third phase in the growth curve. In this phase, plant exhibits declining growth activity. This phase corresponds to maturity of cells.
B. Lag phase - This is the first phase of growth. In this, the growth will be slow but steady. In this, new cells formation takes place from the meristematic zone.
This is also called formative phase.
C. Exponential phase - This is the second phase of growth. This is a period of maximum growth. In this phase, the plant shows a rapid increase in its height. It is also called Logarithmic phase.
D. Senescent phase – It is the last phase of the growth curve. In this growth of the cells or organs stops, the death of the body occurs.
So, the correct option is ‘Exponential phase’.