Male gonopores in earthworm are located on 18th segment.

Explanation

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks whether the statement "Male gonopores in earthworm are located on the 18th segment" is correct or false.

2. **Identifying Gonopores**: Gonopores are openings through which reproductive and excretory materials are expelled. In earthworms, these are specifically involved in the transfer of sperm.

3. **Locating Male Gonopores**: In earthworms, the male gonopores are indeed located on the 18th segment of the body. This is a well-established fact in the study of earthworm anatomy.

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