Arrange the given alkenes in decreasing order of their reactivity towards bromination:
Arrange the following compounds in the increasing order of their densities.
(a) (i) < (ii) < (iii) <(iv) (b) (i) < (iii) < (iv) < (ii)
(c) (iv) <(iii) <(ii) < (i) (d) (ii) < (iv) < (iii) < (i)