Find the incorrect one:

Options

A. Plants obtain their inoriganic nutrients from air and soil
B. An initial uptake of ions in free space is slow
C. `NH_(3)` is the first stable product of `N_(2)` fixation process
D. Division and growth of cortical and pericycle cells lead to nodule formation in legumes

Answer

To solve the question "Find the incorrect one," we need to analyze each of the statements provided in the options. Here’s a step-by-step breakdown:

### Step 1: Analyze the First Statement
**Statement:** "Plants obtain inorganic nutrients from air and soil."
- **Analysis:** Plants primarily absorb water and minerals from the soil through their roots. While they do take in carbon dioxide from the air for photosynthesis, they do not absorb inorganic nutrients from the air. Therefore, this statement is incorrect.

### Step 2: Analyze the Second Statement
**Statement:** "Initial uptake of iron in the free space is slow."
- **Analysis:** The uptake of iron by plants can indeed be slow, especially because iron is often present in forms that are not readily available to plants. This statement is correct.

### Step 3: Analyze the Third Statement
**Statement:** "NH3 is the first stable product of N2 fixation process."
- **Analysis:** In the nitrogen fixation process, nitrogen gas (N2) is converted into ammonia (NH3), which is indeed the first stable product. This statement is correct.

### Step 4: Analyze the Fourth Statement
**Statement:** "Division and growth of cortical and the pericycle leads to nodule formation in the legume."
- **Analysis:** In legumes, the formation of root nodules, where nitrogen-fixing bacteria reside, involves the division and growth of cortical and pericycle cells. This statement is also correct.

### Conclusion
After analyzing all the statements, we find that the first statement is incorrect. Therefore, the answer to the question is:

**Incorrect Statement:** "Plants obtain inorganic nutrients from air and soil."