Deficiency of nitrogen produces

Options

A. blossom end root of tomato
B. Chlorosis
C. die back disease
D. reduced respiration

Answer

### Step-by-Step Solution:

1. **Understanding Nitrogen Deficiency**: Nitrogen is an essential nutrient for plants, playing a critical role in their growth and development. It is a key component of amino acids, proteins, and chlorophyll.

2. **Identifying Symptoms of Nitrogen Deficiency**: When plants lack nitrogen, they exhibit specific symptoms. The most notable symptom is the yellowing of leaves, known as chlorosis.

3. **Explaining Chlorosis**: Chlorosis occurs because nitrogen is vital for chlorophyll production. Without sufficient nitrogen, chlorophyll levels drop, leading to a loss of the green color in leaves. Instead, the leaves turn yellow.

4. **Consequences of Chlorosis**: Yellow leaves are less effective in photosynthesis, which can hinder the plant's growth and overall health. In severe cases, if nitrogen deficiency is not corrected, the affected leaves may die.

5. **Evaluating the Options**: The question provides four options regarding the effects of nitrogen deficiency:
- A. Blossom end rot of tomato
- B. Chlorosis
- C. Dieback disease
- D. Reduced respiration

Among these, chlorosis is the direct result of nitrogen deficiency.

6. **Conclusion**: Therefore, the correct answer to the question "Deficiency of nitrogen produces" is **B. Chlorosis**.