The logic followed is: Logic: We have to find the relationship between the given words. Given: For, "Flowers : Jasmine". The flower is related to Jasmine as it is a kind of flower. Option 1: For, "Fruits ∶ Leaves".→ False. As Leaves are not any kind of Fruits. Option 2: For, "Pencil ∶ Geometry".→ False. As pencils don't fall in the category of any Geometry. Option 3: For, "Arithmetic ∶ Calculator".→ False. As the calculator is not any kind of arithmetic. Option 4: For, "Colours ∶ Blue".→ True. As blue is a kind of colour. As it can be seen that colour is analogous to Blue in the same way as flowers to jasmine. Hence, the correct answer is "Colours ∶ Blue".