Explanation:

Correct option 2: John Austin

John Austin, a prominent legal theorist and the founder of the Analytical School of Jurisprudence, defined law as: 

“A rule laid down for the guidance of an intelligent being by an intelligent being having power over him.”

The longer and more detailed version of his definition is: 

"Law is an assemblage of signs, declarative of a volition conceived or adopted by the sovereign in a state, concerning the conduct to be observed in a certain case by a certain person or class of persons, who in the case in question are or are supposed to be subject to his power."

This definition emphasizes:

• Law as a command of the sovereign,

• Addressed to those subject to the sovereign’s authority,

• Enforceable by sanctions.