Answer:
option 3
Explanation:
The correct answer is option 3.
Water is used as the main ingredient of coolant in car radiator because it has high heat capacity.
Specific heat capacity of a substance is the heat require to raise the temperature of the substance per unit mass.
Heat capacity of water is 4.184 J
As heat require to increase the temperature of the water of 1 gram is huge then water can absorb the heat of the radiator i.e. it can be used as Coolant.