Question: 123. Find the correct statements:
A. In human pregnancy, the major organ systems are formed at the end of 12 weeks.
B. In human pregnancy the major organ systems are formed at the end of 8 weeks.
C. In human pregnancy heart is formed after one month of gestation.
D. In human pregnancy, limbs and digits develop by the end of second month.
E. In human pregnancy the appearance of hair usually observed in the fifth month.
Choose the correct answer from the options given below:
(1) A and E Only
(2) B and C Only
(3) B, C, D and E Only
(4) A, C, D and E Only
Answer: Option (4)
Explanation:
By the end of the first trimester, that is about 12 weeks of human pregnancy, the major organ systems are formed, making statement A correct.
At the end of 8 weeks, organogenesis is still in progress, so statement B is incorrect.
The human heart is formed and starts beating by about one month of gestation, making statement C correct.
Limbs and digits develop by the end of the second month of pregnancy, so statement D is correct.
Appearance of hair on the head is usually observed during the fifth month of human pregnancy, making statement E correct.
Therefore, the correct statements are A, C, D and E.