Concept:This question checks awareness of the first industrial-scale fossil-free steel production breakthrough.
Explanation:The world's first customer delivery of fossil-free steel was made by the HYBRIT venture in Sweden.
HYBRIT stands for Hydrogen Breakthrough Ironmaking Technology.
This technology uses 100% fossil-free hydrogen (
H2​) instead of coal and coke for ironmaking.
Using hydrogen eliminates carbon dioxide emissions because no carbon-based fuel is burned.
The delivery proved that green steel production is achievable commercially.
No other country among the given options has achieved this first-ever milestone.
Thus, the correct country is Sweden.
Answer:D. Sweden