The maximum growth rate occurs in the:

Explanation

Maximum growth rate occurs in the exponential or acceleration or log phase. The point at which the exponential growth begins to slow down is known as the inflexion point. The exponential phase, also known as the exponential growth phase, refers to a stage in the growth of a population or a culture of microorganisms when the population size or biomass increases rapidly and continuously at a constant relative rate. This phase is characterized by a J-shaped growth curve on a graph where the population size or biomass increases exponentially over time.