What is the definition of economics based on the most widely known definition?

The definition is based on the relationship between resources, goods, and needs in a context of scarcity.
The definition was proposed by Lionel Robbins in 1932.
The definition is not widely accepted in the academic community.
a) Only statement 1 is correct.
b) Statements 1 and 2 are correct.
c) Statements 1 and 3 are correct.
d) All statements are correct.