Match List I with List II. 

	List I (Interaction)		List II (Species A and B)
A.	Mutualism	I.	$+ \left(\mathrm{A}\right), 0 \left(\mathrm{B}\right)$
B.	Commensalism	II.	$- \left(\mathrm{A}\right), 0 \left(\mathrm{B}\right)$
C.	Amensalism	III.	$+ \left(\mathrm{A}\right),-\left(\mathrm{B}\right)$
D.	Parasitism	IV.	$+ \left(\mathrm{A}\right),+ \left(\mathrm{B}\right)$

                                    Choose the correct answer from the options given below.

	A	B	C	D
(1)	III	I	IV	II
(2)	IV	II	I	III
(3)	IV	I	II	III
(4)	IV	III	I	II

A-IV, B-I, C-II, D-III
A. Mutualism is an interaction between two species in which both species benefit. Therefore, the correct matching
For mutualism is +(A), +(B).
B. Commensalism is an interaction between two species in which one species benefits and the other is neither
Benefited nor harmed. The correct matching for commensalism is +(A), O(B).
C. Amensalism is an interaction between two species in which one species is harmed while the other species is
Unaffected. The correct matching for amensalism is -(A), O(B).
D. Parasitism is an interaction between two species in which one species (the parasite) benefits at the expense of the
Other species (the host). The correct matching for parasitism is +(A), -(B).