Clay < Silt < ? < Coarse < GravelWhich type is missing in the sequence of increasing particle size of soil?

Clay < Silt < ? < Coarse < GravelWhich type is missing in the sequence

1.	Clay < Silt < ? < Coarse < Gravel Which type is missing in the sequence of increasing particle size of soil?
A.	Stone
B.	Rock
C.	Fine Sand
D.	Humus
Answer» D. Humus