Evaluate the following statements and choose the correct option:
S1: Gravity is a force that attracts objects towards the Earth.
S2: Magnetic force can act at a distance without direct contact.
S3: Frictional force always acts in the direction of motion.
S4: Electrostatic force is a type of contact force.
1
S1 and S2 are true, S3 and S4 are false.
2
S1, S2, and S3 are true, S4 is false.
3
S1, S3, and S4 are true, S2 is false.
4
S1 and S4 are true, S2 and S3 are false.