Match the word with definition.
List I
A. Etymon
B. Code switching
C. Cognate
D. Pragmatics
List II
I. Changing from one language variety to another in discourse
II. Rules governing the social use of language
III. Etymological source of a word
IV. Words with a common ancestor
1. A-I, B-III, C-IV, D-II
2. A-II, B-I, C-IV, D-III
3. A-III, B-I, C-IV, D-II
4. A-IV, B-II, C-III, D-I