Nucellar polyembryony occurs in

Options

A. Corchorus
B. Citrus
C. Carthamus
D. Zea mays

Explanation

**Step-by-Step Solution:**

1. **Understanding Nucellar Polyembryony**: Nucellar polyembryony refers to the phenomenon where multiple embryos develop from the nucellar tissue of a seed. The term "nucellar" relates to the nucellus, which is the central part of the ovule.

2. **Definition Breakdown**: The term "polyembryony" can be broken down into two parts: "poly" meaning many, and "embryony" referring to the formation of embryos. Therefore, it indicates the formation of multiple embryos from a single fertilized ovule.

3. **Mechanism**: In nucellar polyembryony, the cells of the nucellus undergo division and develop into embryos. These embryos are genetically identical to the parent plant, as they arise from the same genetic material.

4. **Examples of Plants**: Nucellar polyembryony is commonly observed in certain plant families, particularly in the citrus family (Rutaceae). Other examples may include some species of mango (Mangifera indica) and other related plants.

5. **Conclusion**: Based on the information provided, nucellar polyembryony occurs primarily in the citrus family, distinguishing it from other plants like Carthamus, Zemes, or Corcorus, which do not exhibit this characteristic.

**Final Answer**: Nucellar polyembryony occurs in the citrus family (Rutaceae).

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