Which characteristic is observed in the $Gause's$ Competitive Exclusion Principle?

Choose the correct statements regarding population interactions between two species.
$A$. In both parasitism and commensalism,only one species benefits and the other species is harmed.
$B$. Both species benefit in mutualism.
$C$. Both species benefit in commensalism.
$D$. In parasitism,only one species benefits and the other species is harmed.
$E$. In amensalism,one species is harmed and the other is unaffected.

Cattle or goats are never seen browsing on $Calotropis$ growing in abandoned fields because of the presence of:

Select the $CORRECT$ match:

List-$I$	List-$II$
$i$. Competition	$a$. Tapeworm and man
$ii$. Commensalism	$b$. Lichen
$iii$. Mutualism	$c$. Cattle egret and cattle
$iv$. Parasitism	$d$. Lions and Leopards

Match the Column-$I$ with Column-$II$:

Column-$I$	Column-$II$
$(a)$ Parasitism	$(i)$ $++$
$(b)$ Commensalism	$(ii)$ $+-$
$(c)$ Amensalism	$(iii)$ $0+$
$(d)$ Mutualism	$(iv)$ $0-$

Which of the following is truly classified as a parasite?