In this question, we need to find the mismatched pair. First, let`s analyze each option to understand which one doesn`t fit. Option 1 pairs Tea with Assam, which is correct because Assam is a major producer of tea. Option 3 pairs Coconut with Kerala, which is also correct because Kerala is known for its coconut production. Option 4 pairs Sugarcane with Uttar Pradesh, which is correct as Uttar Pradesh is one of the largest producers of sugarcane in India.

Now, let`s look at Option 2. It pairs Groundnut with Bihar. This seems to be the mismatched pair because groundnut is not typically associated with Bihar.

Therefore, the correct answer is Option 2 - Groundnut - Bihar, as it is the mismatched pair.