The correct option is
C both (a) and (b)
Explanation for Correct answer:
Option (C) - both (a) and (b)
- Fluid is known to be a substance that is capable of flowing as its particles can easily move past each other.
- It only acquires the shape of the container, as it has no shape of its own.
- A fluid has both gaseous and liquid characteristics, hence both liquid and gases are fluids.
- As solid molecules are tightly held together within themselves so it doesn't deform under pressure or flowing properties, so restricted to be called fluids.
Therefore, the correct answer is option (C) - both (a) and (b).