Which of the following options most appropriately describes the term ‘inanimate object?

Which of the following options most appropriately describes the term 'inanimate object'?

1. A non-living article like a pen, pencill, linen or handkerchief which helps in the spread of infection
2. Microbes which cause infection and disease
3. A living organism which helps in the spread of infection from one person to another
4. An infectious agent that may be transferred directly or indirectly from one infected person to another