Given below are some developmental milestones during human embryonic development: A. Separation of eyelids B. Formation of the heart C. First movements of the foetus D. Development of limbs and digits E. Formation of most major organ systems Choose the correct chronological sequence of their appearance during pregnancy:

Step-by-step solution

According to the NCERT textbook, the chronological order of embryonic development is as follows: After one month of pregnancy, the embryo's heart is formed (B). By the end of the second month, the foetus develops limbs and digits (D). By the end of 12 weeks (first trimester), most of the major organ systems are formed (E). During the fifth month, the first movements of the foetus and appearance of hair on the head are observed (C). By the end of about 24 weeks (end of second trimester), the body is covered with fin