A few statements about the mechanism of evolution are made. Mark the correct statements.

(i)  Evolution happens at the individual level as well as population level.

(ii) As changes in the gene pool occur, a population evolves.

(iii) Mutation is the driving force of evolution and it leads to change in a gene pool of population.

(iv) Genetic drift is the change in the gene pool that occurs in a small population because of adaptation. 

(v) Assortative mating can cause an enhance in homozygous individuals and changes the allele frequencies in the population.

a.  (i)  and (ii)

b.  (ii) and (iii)

c.  (i), (iv) and (v)

d.  (i), (ii), (iii) and (v)