True statements regarding the genetic drift is/are
I. it mostly occurs in smaller populations.
II. certain alleles can be lost forever because of genetic drift.
III. founder effects and bottle neck effects are caused by genetic drift.
IV. mutations are primarly responsible for genetic drift.
The correct combination showing true statements is

Find the true (T) and false (F) statements, and choose the correct option.

(i) Darwin said that variations, which are heritable and which make resource utilisation better for few, will enable only those to reproduce and leave more progeny.

(ii) Formation of new microbial species require very little time but for something to happen in a fish/fowl would take millions of years, since they have much longer life spans.

(iii) According to Lamarckism, long-necked giraffes evolved because they were nature selected only, long-necked animals.

(iv) Most modern breeds of dogs have evolved through artificial selection.

If the allele frequency of 'A' is 0.2 the frequency of allele 'a' will be-