Colostrum, the yellowish fluid, secreted by mother during the Inittlal days of lactation is very essentlal to impart immunity to the newbom infants because it contains

A Natural killer cells
B Monocytes
C Macrophages
D Immunoglobulin \(A\)

Verified Solution

Answer & Solution

Correct Answer

(D) Immunoglobulin \(A\)

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 the coordination number and type of hybridisation with distribution of hybrid orbitals in space based on Valence bond theory.

Coordination number and type of hybridisation	Distribution of hybrid orbitals In space
\((a)\) \(4, sp ^{3}\)	\((i)\) trigonal bipyramidal
\((b)\) \(4, dsp ^{2}\)	\((ii)\) octahedral
\((c)\) \(5, sp ^{3} d\)	\((iii)\) tetrahedral
\((d)\) \(6, d ^{2} sp ^{3}\)	\((iv)\) square planar

Select the correct option

NEET 2020 Medium

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Column \(I\)	Column \(II\)
(a) Aptenodytes	(i) Flying fox
(b) Pteropus	(ii) Angel fish
(c) Pterophyllum	(iii) Lamprey
(d) Petromyzon	(iv) Penguin