Correct choice is (c) It has excellent corrosion resistance to fuming nitric acid and it is used as an oxidizer in fuel systems for rockets
Best explanation: Titanium has excellent corrosion resistance to fuming nitric acid and it is used as an oxidizer in fuel systems for rockets. Whereas it exhibits pyrophoric tendencies in red fuming nitric acid if the water content of the acid is below 1.5% and the nitrogen dioxide content is above 2.5%.
