The yellowish fluid "colostrum" secreted by mammary glands of mother during the initial days of lactation has abundant antibodies (\(lgA\)) to protect the infant. This type of immunity is called as

A Autoimmunity
B Passive immunity
C Active immunity
D Acquired immunity

Verified Solution

Answer & Solution

Correct Answer

(B) Passive immunity

Step-by-step Solution

Detailed explanation

Option (2) is correct answer as colostrum is first milk, yellowish fluid secreted by mammary glands of mother during initial days of lactation. It contains IgA antibodies to protect the infants. Such type of immunity in which readymade antibodies reach the body of infants, is called natural passive immunity.

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.

Same subject

Match List \(- I\) with List \(- II.\)

List \(- I\)	List \(- II\)
\((a)\) Allen's Rule	\((i)\) Kangaroo rat
\((b)\) Physiological adaptation	\((ii)\) Desert lizard
\((c)\) Behavioural adaptation	\((iii)\) Marine fish at depth
\((d)\) Biochemical adaptation	\((iv)\) Polar seal

Choose the correct answer from the options given below. \((a) -(b)- (c)- (d)\)

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