Concept:
Rajasthan is home to several well known protected areas, including Sariska Tiger Reserve, Sambhar Wildlife Sanctuary, and Ranthambore National Park, all spread across the state's Aravalli and semi-arid landscape.
Explanation:
Sariska National Park lies in Alwar district of Rajasthan and is a famous tiger reserve, so option A is located in Rajasthan. Sambhar Wildlife Sanctuary surrounds the Sambhar Salt Lake near Jaipur, also within Rajasthan, so option B is in Rajasthan too. Ranthambore National Park, in Sawai Madhopur district, is one of Rajasthan's most visited tiger reserves, so option D is in Rajasthan as well. Rajaji National Park, however, is located in the state of Uttarakhand, spread across the Shivalik hills near Haridwar, Dehradun and Pauri Garhwal, and is best known for its wild elephant population, not tigers of Rajasthan. It has no location in Rajasthan at all.
Final Answer:
Rajaji National Park is the odd one out, since it lies in Uttarakhand, not Rajasthan.