Question

Author of “An Inquiry into the Nature and Causes of Wealth of Nations”
a. Alfred Marshall
b. Adam Smith
c. Lionel Robbins
d. Paul A Samuelson

Answer 1

option (B) ADAM SMITH is the author of this book in which he has stated that the economics is the "science of wealth"

Answer 2

Here is your answer....
The author of "an inquiry into the the nature and causes of wealth" is adam smith.
So answer is B) Adam Smith