Find the correct combination
(A) DCMU ………Herbicide…….Inhibitor of non-cyclic electron transport
(B) PMA…….Fungicide……..Reduces transpiration
(C) Colchicine………Alkaloid……..Causes male sterility
(D) Solnite-Sodium alginate……….Encapsulation of somatic embryos.

Options

A. a, b
B. a, c
C. b, c
D. b, d

Answer

To find the correct combination among the given options, let's analyze each one step by step:

### Step 1: Analyze Option A
- **DCMU**: This is indeed an herbicide, specifically known as di-chlorophenyl 1,1-dimethylurea.
- **Function**: It acts as an inhibitor of non-cyclic electron transport in photosynthesis.
- **Conclusion**: This option is correct.

### Step 2: Analyze Option B
- **PMA**: This stands for phenyl mercuric acetate.
- **Function**: It is a fungicide and acts as an anti-transpirant by closing the stomata, which reduces transpiration.
- **Conclusion**: This option is also correct.

### Step 3: Analyze Option C
- **Colchicine**: This is an alkaloid derived from the plant Colchicum autumnale.
- **Function**: While it is an alkaloid, it does not cause male sterility. Instead, it is known for its anti-gout and anti-inflammatory properties.
- **Conclusion**: This option is incorrect.

### Step 4: Analyze Option D
- **Solnite-Sodium alginate**: Sodium alginate is used for encapsulation of somatic embryos.
- **Function**: However, the statement suggests that solnite is involved in this process, which is misleading. Sodium alginate alone, often in combination with calcium chloride, is responsible for encapsulation.
- **Conclusion**: This option is also incorrect.

### Final Conclusion
- The correct combinations are **A (DCMU)** and **B (PMA)**. Options **C (Colchicine)** and **D (Solnite-Sodium alginate)** are incorrect.

### Summary of Correct Combinations:
- **A**: DCMU - Herbicide - Inhibitor of non-cyclic electron transport (Correct)
- **B**: PMA - Fungicide - Reduces transpiration (Correct)
- **C**: Colchicine - Alkaloid - Causes male sterility (Incorrect)
- **D**: Solnite-Sodium alginate - Encapsulation of somatic embryos (Incorrect)