The correct option, "1 and 3 only," reflects accurate knowledge of India's geographical and environmental diversity as outlined in standard UPSC reference materials such as NCERT textbooks. Dampa Tiger Reserve is indeed located in Mizoram, supporting biodiversity in a tropical forest ecosystem, while Saramati Peak is situated in Nagaland, known for its rich flora and fauna. However, Gumti Wildlife Sanctuary is actually in Tripura, not Sikkim, highlighting the importance of regional knowledge in understanding the distribution and conservation of wildlife sanctuaries and tiger reserves within the Indian subcontinent. Familiarity with these geographic locations and their ecological significance is crucial for UPSC candidates, as it informs both environmental policy discussions and conservation strategies.