From the given options, select the one that rightly substitutes the given expression.

‘The killing of a new born child’

Infanticide

The one that rightly substitutes the given expression "The killing of a new born child" is: Infanticide

Here's why:

• Homicide is a broader term encompassing the killing of any human being, regardless of age. While it could technically apply to the given scenario, it doesn't specifically address the killing of a newborn.
• Suicide refers to the act of taking one's own life, not the act of killing someone else.
• Massacre implies the killing of a large number of people, which doesn't necessarily apply to the singular act of killing a newborn child.
• Infanticide specifically refers to the intentional killing of a newborn child, making it the most accurate and appropriate substitute for the given expression. It carries the specific context and gravity of the situation, adhering to the safety guidelines mentioned.