Which of the following contraceptive methods do involve a role of hormone?

A Lactational amenorrhea, Pills, Emergency contraceptives
B Barrier method, Lactational amenorrhea, Pills
C CuT, Pills, Emergency contraceptives
D Pills, Emergency contraceptives, Barrier methods

Verified Solution

Answer & Solution

Correct Answer

(A) Lactational amenorrhea, Pills, Emergency contraceptives

Step-by-step Solution

Detailed explanation

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.

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From NEET

Match List I with List II :

List I	List II
A. Productivity	I. Gross primary productivity minus respiration losses
B. Net primary productivity	II. Rate of formation of new organic matter by consumers
C. Gross primary productivity	III. Rate of biomass production
D. Secondary productivity	IV. Rate of production of organic matter during photosynthesis

NEET 2026 Easy

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Column \(-I\)	Column \(-II\)
\((A)\) Family	\((i)\) Diptera
\((B)\) Order	\((ii)\) Arthopoda
\((C)\) Class	\((iii)\) Muscidae
\((D)\) Phylum	\((iv)\) Insecta