From the options given below, choose the one which can substitute the given expression-

Operation of the human body after the death of a person.

Post-mortem

The answer is Post-mortem.

• Obituary is a notice of someone's death, typically published in a newspaper or online.
• Homage is a gesture of respect or admiration.
• Mortuary is a place where dead bodies are stored before burial or cremation.
• Post-mortem is an examination of a dead body to determine the cause of death.