The technique of growing plants in a nutrients solution, in complete absence of soil is called as

Options

A. aeroponics
B. water culture
C. hydroponics
D. soil culture

Explanation

To solve the question "The technique of growing plants in a nutrient solution, in complete absence of soil is called as," we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Question**: The question is asking for a specific technique used for growing plants without soil, utilizing a nutrient solution instead.

2. **Identify the Options**: The options provided are:
- A) Aeroponics
- B) Water culture
- C) Hydroponics
- D) Soil culture

3. **Define Each Term**:
- **Aeroponics**: A method where plants are grown with their roots suspended in a mist of nutrient solution, but not in a liquid medium.
- **Water Culture**: A method where plants are grown in a liquid medium, typically involving a larger volume of water.
- **Hydroponics**: A soilless method of growing plants directly in a nutrient solution, which can be more efficient in water usage compared to water culture.
- **Soil Culture**: This involves growing plants in soil, which is not applicable to the question.

4. **Analyze the Definitions**: Since the question specifies "in complete absence of soil," we can eliminate soil culture immediately. Aeroponics involves mist, which is not a nutrient solution in the same sense as hydroponics.

5. **Compare Hydroponics and Water Culture**: Both hydroponics and water culture involve growing plants in a nutrient solution. However, hydroponics is specifically designed for efficient nutrient delivery and typically uses less water than traditional water culture.

6. **Select the Correct Answer**: Given that hydroponics is defined as growing plants in a nutrient solution without soil, the correct answer is **C) Hydroponics**.

### Final Answer:
The technique of growing plants in a nutrient solution, in complete absence of soil is called **C) Hydroponics**.

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