The correct answer is A. Robbins.
Lionel Robbins was a British economist who is best known for his work on the foundations of economic theory. He is also known for his views on the role of economics in society, which he argued should be neutral between ends. This means that economics should not be used to promote any particular set of values or goals, but should instead be used to provide a framework for understanding the choices that individuals and societies make.
Marshall was an English economist who is considered one of the founders of neoclassical economics. He is best known for his work on the theory of value and distribution. Marshall argued that economics should be based on the study of human behavior, and that it should be used to improve the welfare of society.
Pigou was an English economist who is best known for his work on welfare economics. He argued that the government should intervene in the economy to correct market failures and promote economic efficiency.
Adam Smith was a Scottish economist and philosopher who is considered the father of modern economics. He is best known for his work on the theory of free markets, which he argued would lead to the greatest good for the greatest number of people.
In conclusion, Robbins was the economist who expressed the view that ‘Economics should be neutral between ends’. This means that economics should not be used to promote any particular set of values or goals, but should instead be used to provide a framework for understanding the choices that individuals and societies make.