JEE Main 2021 Chemistry question

Sulphide ion is soft base and its ores are commonfor metals. (a) Pb (b) Al (c) Ag (d) Mg Choose the correct answer from the options given below :

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