Q1. In October 2025 China tightened export controls by adding five more rare-earth metals. Which of the following is NOT among those five?
Explanation
Yttrium was already in the earlier seven-mineral restriction list (samarium, gadolinium, terbium, dysprosium, lutetium, scandium, yttrium). The five added in October 2025 were holmium, erbium, thulium, europium and ytterbium.
