Which of the following statements in incorrect?

Options

A. Earthworm and leech are hermaphrodite animals.
B. Young ones of animals which have external fertilisation receive little or non-parental care.
C. If the egg is not fertilised, it is thrown out of the body along with the lining of the uterus as menstrual flow.
D. Sex organs in human beings are formed at puberty.

Explanation

To determine which statement is incorrect among the provided options, we will analyze each statement one by one.

### Step 1: Analyze Statement 1
**Statement 1:** Earthworm and Leech are hermaphrodite animals.
- **Explanation:** Hermaphrodites are organisms that possess both male and female reproductive organs. Earthworms and leeches are indeed hermaphrodites, as they can produce both sperm and ova.
- **Conclusion:** This statement is correct.

### Step 2: Analyze Statement 2
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