History of science — gunpowder: Who is credited with the invention of gunpowder? Identify the correct origin. Choose the correct option.

Given data

• The prompt asks for the inventors and origin region of gunpowder.

Concept / Approach
Historical sources attribute the invention of gunpowder to Chinese alchemists during the Tang period, with recipes recorded in early military and alchemical texts.

Why the others are incorrect
Roger Bacon described gunpowder later; Arab scholars transmitted and improved knowledge subsequently; Alfred Nobel invented dynamite, not gunpowder.

Final Answer
Chinese alchemists in 9th-century China.