Approaches to sampling commonly used in qualitative research design are given in Set - I and their characteristics in Set - II. Match Set - I and Set - II and select the appropriate code.

Set-I (Approaches to sampling in qualitative research)	Set-II (Characteristics)
(a) Extreme case sampling	(i) Seeks cases that are typical
	(ii) Seeks cases that are highly similar to each other
(b) Purposive sampling	(iii) Seeks cases that are unusual
	(iv) Seeks help from participants to identify additional participants
(c) Snowball sampling	(v) Seeks cases according to his/her judgment  about the appropriateness