Who coined the term ‘zeroth law of thermodynamics’ in 1931, which asserts that two bodies in equilibrium with a third are in equilibrium with each other?

The correct answer is Ralph H Fowler.

Step-by-step Explanation:

1. Understanding the Zeroth Law of Thermodynamics:
The Zeroth Law of Thermodynamics states that if two thermodynamic systems are each in thermal equilibrium with a third system, then they are in thermal equilibrium with each other. This law is fundamental as it defines the concept of temperature and validates the use of thermometers.

2. Historical Context and Naming:
Historically, the First and Second Laws of Thermodynamics were already well-established by the mid-19th century. However, scientists later realized that a more fundamental postulate was needed to define temperature and establish a logical basis for the other laws.
Since the First and Second Laws were already widely accepted and numbered, renaming them would cause significant confusion. Therefore, the British physicist and astronomer Ralph H. Fowler proposed naming this fundamental principle the "Zeroth Law" in 1931 when discussing the work of Meghnad Saha and William Richard Srivastava.

3. Conclusion:
Among the given options, Ralph H Fowler is the scientist who coined the term "zeroth law of thermodynamics" in 1931.