NEET2026BiologyChapterActual
Match List I with List II regarding the key milestones of embryonic development in humans: List I List II A End of first month I Separation of eye-lids and formation of eyelashes B End of first trimester II Appearance of hair on the head and foetal movement C During fifth month III Formation of the heart D End of second trimester IV Well-developed external genital organs and limbs Choose the correct answer from the o
Options
- AA-III, B-II, C-IV, D-I
- BA-III, B-IV, C-II, D-I
- CA-IV, B-III, C-II, D-I
- DA-III, B-IV, C-I, D-II
Correct answer
B. A-III, B-IV, C-II, D-I
Step-by-step solution
According to the key milestones of human embryonic development: After one month of pregnancy, the embryo's heart is formed. Thus, A matches III. By the end of 12 weeks (first trimester), most of the major organ systems are formed. For example, the limbs and external genital organs are well-developed. Thus, B matches IV. The first movements of the foetus and appearance of hair on the head are usually observed during the fifth month. Thus, C matches II. By the end of about 24 weeks (end of second trimester), the body