Choose the correct options
I. Gametes are always produced from diploid parent plant body.
II. Meiocytes are sporocytes in all plants.
III. The gymnosperms and pteriodophytes have diploid parent body.
IV. In seed plants, pollen grains are carrier of male gametes.

Options

A. I, II are correct
B. III, IV are correct
C. I, III are correct
D. II, IV are correct

Answer

To solve the question, we will analyze each of the given statements one by one:

### Step-by-Step Solution:

1. **Statement I: Gametes are always produced from diploid parent plant body.**
- This statement is **incorrect**. In certain plants, particularly in bryophytes and some algae, the main plant body is haploid (gametophyte), and it produces gametes directly from haploid cells. Therefore, gametes can be produced from haploid parent bodies, not exclusively from diploid ones.

2. **Statement II: Meiocytes are sporocytes in all plants.**
- This statement is also **incorrect**. Meiocytes (or meiotic cells) are specifically the cells that undergo meiosis to form gametes in diploid organisms. However, in plants with a haplontic life cycle, meiocytes can be haploid and are not sporocytes. Sporocytes refer to diploid cells that undergo meiosis to produce spores, which is not applicable to all plants.

3. **Statement III: The gymnosperms and pteridophytes have diploid parent body.**
- This statement is **correct**. Both gymnosperms and pteridophytes have a dominant diploid generation known as the sporophyte. The sporophyte is the main plant body that produces spores through meiosis.

4. **Statement IV: In seed plants, pollen grains are carriers of male gametes.**
- This statement is **correct**. In seed plants, particularly angiosperms, pollen grains contain male gametes. Each pollen grain typically carries two male gametes, which are involved in fertilization.

### Conclusion:
Based on the analysis:
- **Correct Statements:** III and IV
- **Incorrect Statements:** I and II

Thus, the correct options to choose are III and IV.

### Final Answer:
The correct options are III and IV.

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