Step 1: Understanding the biological significance of each component.
The substances listed in Column-I are associated with reproductive physiology and protective mechanisms. Each has a distinct role either in semen composition or in maintaining reproductive health.
Step 2: Correct matching of Column-I with Column-II.
A. Fibrinogen: Fibrinogen is responsible for the coagulation of semen after ejaculation, which helps retain sperms inside the female reproductive tract. Hence, A is matched with (iii).
B. Fructose: Fructose serves as the primary source of energy for sperms, supporting their motility. Hence, B is matched with (iv).
C. Prostaglandins: Prostaglandins stimulate contractions in the female reproductive tract, aiding sperm transport towards the ovum. Hence, C is matched with (i).
D. Lactobacilli in vagina: Lactobacilli help maintain an acidic environment in the vagina and thereby prevent fungal infection. Hence, D is matched with (ii).
Step 3: Final conclusion.
The correct matching is A-(iii), B-(iv), C-(i), and D-(ii), which corresponds to option (C).