Which of the following properties are desired in materials for permanent magnets?

(A) High retentivity
(B) High coercivity
(C) High permeability
(D) low permeability

Choose the correct answer from the options given below:

(A), (B) and (C) only

The correct answer is Option (3) → (A), (B) and (C) only

For permanent magnets:

(A) High retentivity → to retain strong magnetization.

(B) High coercivity → to resist demagnetization.

(C) High permeability → to allow easy magnetization during preparation.

∴ Correct options: (A), (B), and (C)