Which of the following is/are example(s) of non-contact force?

Non-contact forces act on objects without physical contact between them. Magnetic force is a classic example — a magnet can attract iron objects from a distance without touching them. Gravitational force is also a non-contact force, but among the given options the question requires selecting the best single answer. Muscular force is a contact force as it requires direct contact. Note: The question is ambiguous as both gravitation and magnetic forces are non-contact, but as per the official answer key, magnetic force is the intended answer.