Joyeeta collects a sample of soil from an area. She observes that the soil is composed of sand, clay, gravel and humus. She mixes the soil into a glass of water and allows the mixture to settle down. She observes that different components settle in different layers in the glass. 'Which of the following arrow diagrams correctly represents the sequence in which the different components settle in the glass, starting from the topmost layer?

Options

A. Clay `rarr` Gravel `rarr` Water` rarr` Sand `rarr` Humns
B. Humns`rarr` Sand`rarr` Water`rarr` Gravel`rarr` Clay
C. Humns `rarr` Water `rarr` Clay`rarr` Sand`rarr` Gravel
D. Gravel `rarr` Sand `rarr` Clay `rarr` Water `rarr` Humus