MHT CET · BIOLOGY · STD 12 - 9. Control and Coordination

Select the correct statements regarding Thymus gland.
i. It is located in the upper part of thorax.
ii. It is made up of four lobes of lymphoid tissue.
iii. It is a prominent gland formed at birth and remains active throughout life.
iv. It is also called temporary gland.
v. It plays an important role in the development of immune system and provides humoral immunity.
In the light of above statements, choose the correct option from below.

A i, ii and iii only
B ii, iv and v only
C iii and v only
D i, iv and v only

Verified Solution

Answer & Solution

Correct Answer

(D) i, iv and v only

Step-by-step Solution

Detailed explanation

Thymus gland is a soft, pinkish and bilobed mass of lymphoid tissue.
It is a prominent gland at birth but gets gradually atrophied in the adult, so it is called a temporary gland.

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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	Column I		Column II
i.	Jaundice	a.	Associated with nauseatic feeling.
ii.	Diarrhoea	b.	Difficulty in defaecation.
iii.	Vomiting	c.	Yellowness of conjunctiva of eyes.
iv.	Constipation	d.	Blood in stool