Question

which three elements have strong magnetic properties?
○a. lithium, sodium, and potassium
○b. iron, cobalt, and nickel
○c. boron, carbon, and silicon
○d. neon, argon, and krypton

Explanation:

Iron, cobalt, and nickel are ferromagnetic elements which have strong magnetic properties. Other options do not contain such elements.

Answer:

B. iron, cobalt, and nickel