JEE Main 2020 Chemistry question

The incorrect statements(s) among (a) – (c) is are : (a) W(VI) is more stable than Cr(VI). (b) in the presence of HCl permanganate titrations provide satisfactory results. (c) some lanthanoid oxides can be used as phosphors.

• (A)(a) only
• (B)(b) and (c) only
• (C)(a) and (b) only
• (D)(b) onlyCorrect