And A fossil is any preserved remains, impression, or trace of any once-living thing from a past geological age. Examples include bones, shells, exoskeletons, stone imprints of animals or microbes, objects preserved in amber, hair, petrified wood, oil, coal, and DNA remnants.
Specimens are usually considered to be fossils if they are over 10,000 years old. The oldest fossils are around 3.48 billion years old to 4.1 billion years old.
will depend on what solution are we talking about
B. Nosocomial Infection
A Hospital-Acquired Infection (HAI) known as Nosocomial Infection is an infection that is acquired in a hospital or other health care facility. To emphasize both hospital and non-hospital settings, it is sometimes instead called a healthcare-associated infection (HAI-HCAI)