Liquids are the only fluids. State true and false.
A. True
B. False

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Hint: The substances which own the property to flow are known as fluids. Fluid continuously deforms. Fluids comprise liquids, gases and plasmas. They possess zero shear modulus that they cannot resist any force applied to them.

Complete answer:
We know that the liquid possesses the property to flow. Liquids are a bit difficult to compress. It adapts the shape of the container in which it is stored but it retains a nearly constant volume independent of pressure.
Similarly, gases also possess the property to flow like liquids. Gases have vast separation among individual gas particles. Gases are easily compressible because the separation between the gases molecules are vast enough. Gases have no fixed shape and no fixed volume. Gases have lower density than other states of matter.
Plasma, also referred to as the fourth state of matter. Matter within the plasma state has variable volume and shape, and contains neutral atoms also as a big number of ions and they will move around freely.
Thus, from the above discussion we conclude liquids are not the only fluids that can flow.

So, the correct answer is “Option B”.

Additional Information: Plasmas are similar to gases and the atoms are made up of free electrons and ions of an element like neon. It's very rare to find naturally occurring plasma on earth. Plasma is different from gas, because it's made from groups of positively charged particles. In neon gas, the electrons are all bound to the nucleus but when In neon plasma, the electrons are free to move around the system.

Note: Bulk Modulus measures the resistance a fluid offers to compression. It is defined because the ratio of pressure stress to volumetric strain. Whereas, shear modulus measures the stiffness of the material. Shear modulus of liquids is zero.