Which of the following is not correctly matched?

Options

A. Royal botanical garden - England
B. Indian Botanical garden - Lucknow
C. National botanical research institute - Lucknow
D. The Darwin of 20th century - Ernst Mayr

Answer

To determine which of the following matches is not correctly matched, we will analyze each option provided in the question.

### Step-by-Step Solution:

1. **Identify the Matches**: The question provides several matches between botanical gardens or researchers and their locations or contributions.

2. **Evaluate Each Match**:
- **Match 1**: Royal Botanical Garden - England
- **Evaluation**: The Royal Botanical Garden is indeed located in England (specifically in Kew, London). This match is correct.

- **Match 2**: Indian Botanical Garden - Lucknow
- **Evaluation**: The Indian Botanical Garden is incorrectly matched with Lucknow. The correct location is Haora (Howrah), West Bengal. This match is incorrect.

- **Match 3**: National Botanical Research Institute - Lucknow
- **Evaluation**: The National Botanical Research Institute is correctly located in Lucknow, Uttar Pradesh. This match is correct.

- **Match 4**: Darwin of 20th Century - Ernst Mayer
- **Evaluation**: Ernst Mayer is indeed referred to as the Darwin of the 20th century due to his contributions to evolutionary theory. This match is correct.

3. **Conclusion**: The only incorrect match is the second one: Indian Botanical Garden - Lucknow. The correct location is Haora, West Bengal.

### Final Answer:
The match that is not correctly matched is: **Indian Botanical Garden - Lucknow**.

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