Match List I with List II and select the correct answer:

List I (Doctrine)	List II (Meaning)
a. Doctrine of Pith and Substance	1. You cannot do indirectly what you cannot do directly
b. Doctrine of Incidental Encroachment	2. The part of the Statute which is bad can be served from the rest
c. Doctrine of Severability	3. A law is not invalid even though trenched incidentally to another List
d. Doctrine of Colourable Legislation	4. True nature and character of the legislation