Exponential phase of growth among the following is .

Options

A. Lag phase
B. Senescence phase
C. Logarithmic phase
D. Steady state

Answer

To determine the exponential phase of growth from the given options, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Exponential Phase**: The exponential phase, also known as the log phase, is a period in the growth curve of bacteria where the population size doubles at regular intervals. During this phase, the cells are actively dividing, and the growth rate is constant.

2. **Analyze the Options**:
- **Option A: Lactase** - This is an enzyme, not a phase of growth.
- **Option B: Sensual Phase** - This term does not relate to growth phases in biology.
- **Option C: Logarithmic Phase** - This is another name for the exponential phase, where the growth is rapid and the population doubles at a constant rate.
- **Option D: Steady Phase** - This phase occurs after the exponential phase when the growth rate slows down, and the population stabilizes.

3. **Identify the Correct Option**: Based on the definitions and characteristics of the phases:
- The exponential phase is synonymous with the logarithmic phase. Therefore, the correct answer is **Option C: Logarithmic Phase**.

### Final Answer:
The exponential phase of growth among the following is **Option C: Logarithmic Phase**.

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