text: <unk>  is one of the four principal states of matter. A<unk>  is a fluid that can freely form a distinct surface at the boundaries of its bulk material. The surface is a free surface where the<unk>  is not constrained by a container.
option_0: Liquid
option_1: Aqueous solution
option_2: Flammable liquid
option_3: Lipodissolve
option_4: Cathartic
option_5: Acid-fast
option_6: Inhalant
option_7: Biopolymer