In which of the following interactions both partners are adversely affected?

Statements

$I.$ Recent studies support competition as suggested in 'Gauses's Competitive Exclusion Principle'

$II.$ Gause's hypothesis says if two species compete for same resources then one will be eliminated by another species

$III.$ More recent studies point out that species facing competition might evolve mechanisms that promote co-existence rather than exclusion

$IV.$ Gause's competitive exclusion principle is effective when resources are in excess

$V.$ Unlimited resources give better opportunity for adaptation

Choose the correct combination of statements

Select the incorrect match w.r.t. interspecific interaction

species $A$ $\quad\;$species $B$ $\quad$interaction 

In figs pollination done only by..............., not by any another.

Which one of the following population interactions is widely used in medical science for the production of antibiotics?