Out of following statements : I, II, and IIII : A system may be a complex as a human body or as simple as a mixture consisting of a drop of water.II : A system is said to be macroscopic when it consists of large number of molecules, atoms or ions.III : Pressure, volume, temperature and surface area are some macroscopic properties.Select the correct statements.

Macroscopic system: Any system that is large enough to be observable using our senses are known as a macroscopic system. The state of a macroscopic system is represented by macroscopic parameters like pressure, volume, temperature, entropy, electrical resistivity and so on.(Similarly, microscopic systems included atoms and molecules, i.e. things we cannot see with naked eyed.) Since macroscopic property defines a bulk property, we can also say that a system that consists of a large number of molecules, atoms or ions is called a macroscopic system.