Which of the following statements is correct regarding foetal development in humans ?

Options

A. By the end of the first month of pregnancy, the foetus develops limbs and digits
B. By the end of 12 weeks ( second trimester ) , most of the major organ systems are formed .
C. The first movements of the foetus and appearance of hair on the head is usually observed during the fifth month.
D. By the end of about 26 weeks( end of the second trimester ) , the body is covered with fine hair, eye-lids separate, and eye lashes are formed.