The correct answer is option 1 - Lacustrine deposits. Lacustrine deposits are sedimentary deposits that form in lakes, and they can provide valuable information about past climate conditions. These deposits can contain layers of organic material, pollen, and other indicators of past vegetation and environmental conditions. By analyzing lacustrine deposits, scientists can determine past temperature and precipitation patterns, as well as the presence of certain species in the lake ecosystem.

Option 2 - Ice sheets and ice cores are indeed palaeoclimatic geological indicators. Ice sheets, such as those in Greenland and Antarctica, preserve layers of snow and ice that can provide information about past climate conditions. Ice cores, drilled from these ice sheets, contain trapped air bubbles and other substances that can be analyzed to determine atmospheric composition and temperature.

Option 3 - Evaporite deposits, such as salt deposits, can also provide information about past climate. The formation of evaporite deposits is dependent on factors like temperature, aridity, and the presence of evaporating bodies of water.

Option 4 - Sedimentary deposits in general are important palaeoclimatic geological indicators. They can contain information about sea levels, weathering patterns, and the deposition of certain minerals and fossils that can give insights into past climate conditions.

Therefore