"¿Cuál de las siguientes aleaciones tiene la rugosidad superficial más alta?"
	A: "Acero inoxidable"
	B: Elgiloy (Note: Elgiloy is a brand name for a specific type of corrosion-resistant metal alloy)
	C: NiTi (no changes needed as it is an abbreviation and not a common word)
	D: TMA
	
NiTi (no changes needed as it is an abbreviation and not a common word)