Step 1: Concept
Contraceptive methods.
Step 2: Meaning
Classifying birth control techniques.
Step 3: Analysis
Vasectomy is a surgical method (A-III). Coitus interruptus is a natural method (B-IV). Cervical caps are barrier methods (C-II). Saheli is an oral pill (D-I).
Step 4: Conclusion
The correct matching is A-III, B-IV, C-II, D-I.
Final Answer: (C)