Choose the correct statements –
(1) Force of friction is partically independent of microscopic area of surface in contact and relative velocity between them. (if it is not high)
(2) Normally with increase in smoothness friction decreases. But if the surface area are made too smooth by polishing and cleaning the bonding force of adhesion will increase and so the friction will increase resulting in 'Cold welding'
(3) Friction is a non conservative force, i.e. work done against friction is path dependent.
(4) Force of fricton depends on area

Options

A. 1, 2 and 3 are correct
B. 1 and 2 are correct
C. 2 and 4 are correct
D. 1 and 3 are correct