With reference to India, Didwana, Kuchaman, Sargol and Khatu are the names of

Answer: D. DIDWANA, KUCHAMAN, SARGOL, and KHATU are SALINE LAKES. These are SALINE LAKES located in the ARID/SEMI-ARID REGION OF RAJASTHAN. They are part of the THAR DESERT'S INTERNAL DRAINAGE BASINS where rainwater collects in closed depressions, evaporates, and leaves behind salt deposits. - DIDWANA — in Nagaur district, Rajasthan. Major salt-producing lake; salt extraction is commercial. - KUCHAMAN — also in Nagaur district. Another important saline lake-cum-salt production site. - SARGOL and KHATU — smaller saline lakes in the Shekhawati/Nagaur region. The largest and most famous saline lake of Rajasthan is the SAMBHAR LAKE (in Jaipur/Nagaur districts), India's largest inland saline lake and a Ramsar site, accounting for nearly 9% of India's salt production. These other lakes (Didwana, Kuchaman) supplement Rajasthan's salt economy. GEOLOGICAL FORMATION: These lakes occupy shallow depressions in the Aravalli foothills. Lack of outflow + high evaporation in arid climate + saline groundwater inflow → progressive salt accumulation. The salt is mined as a major industry. Distractors: (A) Glaciers — Indian glaciers are Himalayan (Gangotri, Yamunotri, Pindari, Siachen, Chong Kumdan, Drang Drung, Hispar). These names are not Himalayan glaciers. (B) Mangrove areas — found in Sundarbans, Bhitarkanika, Coringa, Pichavaram, Gulf of Kutch, Goa. These names are not mangrove sites. (C) Ramsar sites — list of Ramsar wetlands in India includes Chilika, Keoladeo, Loktak, Wular, Harike, Pong, Sambhar, etc. Didwana, Kuchaman, Sargol, Khatu are NOT Ramsar-listed. Source: NCERT Class 11 India: Physical Environment / GSI hydrogeology reports.