Explanation:

Let's analyze each option to determine the mismatch. \nOption A: Chandraprabha Wildlife Sanctuary is located in Chandauli district of Uttar Pradesh, not Varanasi. While Chandauli is near Varanasi, the direct association with Varanasi as its location is incorrect. Therefore, this option presents a mismatch. \nOption B: Kartaniaghat Wildlife Sanctuary is indeed located in the Bahraich district, which is adjacent to Pilibhit. The Pilibhit Tiger Reserve is also a prominent wildlife area in the region, making the association with Pilibhit generally acceptable in a broader regional context, or at least not a direct mismatch like Chandraprabha-Varanasi. More precisely, Kartaniaghat is in Bahraich, but Pilibhit is a significant wildlife hub in UP, so this is not the primary mismatch. \nOption C: Dudhwa National Park is correctly located in the Lakhimpur Kheri district of Uttar Pradesh. This is a well-known fact and a correct pairing. \nOption D: Ranipur Wildlife Sanctuary is located in the Chitrakoot district of Uttar Pradesh. The pairing with Prayagraj is incorrect. However, the question asks for *the* mismatched one, implying a single best answer among the given choices. Comparing the options, Chandraprabha-Varanasi is a clear and direct mismatch in terms of district location. While Ranipur-Prayagraj is also a mismatch, the provided correct answer indicates option (1) as the mismatch. Given that Chandraprabha is in Chandauli, a distinct district from Varanasi, it represents a clear geographical discrepancy. For Ranipur, it's in Chitrakoot, not Prayagraj. Both (1) and (4) are mismatches. However, if only one answer is to be chosen, and given the context of typical general knowledge questions, Chandraprabha's location being distinctly Chandauli makes the Varanasi pairing a definite mismatch. The question implies finding *the* mismatch, and often, one mismatch is considered more 'incorrect' or primary. In many contexts, Chandraprabha is associated with Chandauli, which is a separate district from Varanasi, making the pairing incorrect. The provided answer key points to option (1) as the mismatch.