Male mating systems have evolved in response to female mating strategies and ecological factors that determine spatial distribution of females. In the table given below, column A represents different mating systems and column B represents different ecological conditions.

	Column A		Column B
P.	Resource defense polygyny	i.	Resource is abundant and occurs all over the habitat
Q.	Lek Mating	ii.	Resource is abundant and occurs in clumps
R.	Monogamy	iii.	Resource is limited and occurrence is unpredictable

Which one of the following statements represents all correct combinations for the kind of mating system with the corresponding ecological condition?