Question

Which of the following retains magnetism for a long
time?
(A) Horse - shoe magnet
(B) Electro magnet
(C) Earth
(D) None of these​

Answer 1

Answer:

Dear mate,

A) house shoe manner is your answer.

Answer 2

Answer:

Horse - shoe if it's a natural magnet

but earth it self act as a huge magnet

electo magnet can attract till current is passed through them.

Explanation:

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