Question

Two objects attract each other. This attraction could be due to:
i) Muscular force
ii) Electrostatic force
iii) Gravitational force
iv) Magnetic force

• A. i
• B. i, ii, iii, and iv
• C. i and ii
  
• D. ii, iii, and iv

Answer 1

The correct option is D ii, iii, and iv

Muscular force is a contact force, it acts between two surfaces in contact. There is no attraction in the case of muscular force.
While the rest three Electrostatic force, Gravitational force, and Magnetic force are contact forces, and they can attract/repel other objects towards them.
Hence, the objects attract each other due to either of the three; Electrostatic force, Gravitational force, and Magnetic force.