Question

Match the months listed in Column-I with the organogenesis of foetus in Column-II.

Column-I		Column-II
(i)	First month	(a)	Separation of eye lids
(ii)	Second month	(b)	Hairs on head
(iii)	Fifth month	(c)	Heart
(iv)	Six month	(d)	Limbs & digits

Choose the correct options :

• A. (i)-(c), (ii)-(d),(iii)-(a),(iv)-(b)
• B. (i)-(b), (ii)-(c),(iii)-(d),(iv)-(a)
• C. (i)-(d), (ii)-(b),(iii)-(c),(iv)-(a)
• D. (i)-(c), (ii)-(d),(iii)-(b),(iv)-(a)

Answer 1

The Correct Option is D

First month (i): The heart (c) begins to form and starts beating by the end of the first month (around day 21-23). This is one of the first organs to develop.

Second month (ii): Basic structures of all major organs develop, including limbs and digits (d). By the end of the second month, the embryo has distinct fingers and toes.

Fifth month (iii): Hair on head (b) (lanugo) appears, along with other features like quickening (mother feels movement).

Sixth month (iv): Separation of eyelids (a) occurs, and the eyes may begin to open. The fetus also develops more fat and more defined features.

The correct matching is therefore: (i)-(c), (ii)-(d), (iii)-(b), (iv)-(a)

Thus, the correct option is (D) (c) (d) (b) (a).

Answer 2

During the first month (i), the heart (c) forms and begins beating. The second month (ii) sees development of limbs and digits (d). By the fifth month (iii), hair appears on the head (b), and in the sixth month (iv), eye lids separate (a). This progression reflects the fundamental principles of organogenesis, where major organs form early (heart) followed by refinement of structures (limbs, hair) and final maturation (eye lid separation) in later gestation. 

The correct matching is (D): (c) (d) (b) (a).