Match List-I (Life-forms of plants in desert ecosystem) with List-II (Species characteristics) and select the correct answer:

List-I	List-II
a. Annuals	1. Species which remain dormant in the soil during dry period but are able to respond quickly to cool or wet periods
b. Desert shrubs	2. Species which store water in their water storage tissues
c. Succulents	3. Species mat avoid drought by growing in presence of adequate moisture
d. Microflora	4. Species with numerous branches arising from the basal part of the short stem and small thick leaves that may be shed during dry periods