Explanation:

Correct Option 4: None of above

The jurist who called Austin's Analytical School the "Imperative School" is: Holland
 

John Austin is a key figure in the Analytical School of Jurisprudence.

He emphasized that law is a command issued by a sovereign and backed by sanction — this focus on commands led to the term "Imperative School".

Sir Thomas Erskine Holland, another legal scholar, referred to Austin’s school as the "Imperative School of Law" due to its focus on the law as commands of the sovereign.