Single Megaspore Mothe Cell (MMC) with dense cytoplasm aond a prominent nucleus gets differentiated from nucellus near the micropylar region. This Megaspore Mother Cell (MMC) undergoes meiosis to form ‘4’ haploid cells called megaspores and the process of formation of known as megasporogenesis. Hence, correct option is (B).

Megaspores are produced from the megaspore mother cells after meiotic division. Let's understand this process in detail.

Explanation:
- Megaspore mother cells are specialized cells found in the ovules of plants. These cells undergo meiosis to produce megaspores.
- Meiosis is a type of cell division that results in the formation of four daughter cells, each with half the number of chromosomes as the parent cell. In the case of megaspore mother cells, meiosis produces four haploid megaspores.
- Out of these four megaspores, only one survives and develops into the female gametophyte, which is responsible for producing the egg cell.
- The other three megaspores degenerate and do not contribute to the formation of the female gametophyte.
- The surviving megaspore undergoes several rounds of mitotic division, leading to the formation of a multicellular female gametophyte.
- The female gametophyte consists of several cells, including the egg cell, which is fertilized by the sperm cell during sexual reproduction.
- Thus, the production of megaspores through meiotic division is crucial for the formation of the female gametophyte and ultimately, the production of seeds in plants.

Conclusion:
Megaspores are produced from the megaspore mother cells after meiotic division, which leads to the formation of four haploid megaspores. Only one of these megaspores survives and develops into the female gametophyte, which is responsible for producing the egg cell. This process is crucial for sexual reproduction and the formation of seeds in plants.

Megaspother mother cell (2n) will undergo MEIOTIC DIVISION to produce 4 haploid megaspores.option A is correct.