UPSC Geo-Scientist Prelims 2026 Paper II (Geology/Hydrogeology) Question Paper (08-Feb-2026) serves as a critical benchmark for candidates targeting officer positions in the Geological Survey of India and Central Ground Water Board. This technical assessment features multiple-choice questions covering core domains such as Physical Geology, Structural Geology, Mineralogy, Petrology and Hydrogeology. Analyzing this specific question set is essential for mastering the analytical depth of the Earth Sciences syllabus and refining the precision needed to secure a high rank in the Combined Geo-Scientist Examination.