Which of these developments occurs during the 1 ^ st trimester of pregnancy? (A). Arms, hands, fingers, feet, toes are formed. (B). Baby's movements can be easily felt by the mother. (C). Foetus can open and close mouth and fists. (D). The CNS is developing, working of the excretory and circulatory systems begins. Choose the correct answer from the options given below:

Step-by-step solution

The first trimester of pregnancy corresponds to the first 12 weeks. Let us evaluate the given statements: Statement (A) is correct. By the end of the second month of pregnancy, which is within the first trimester, the foetus develops limbs and digits, including arms, hands, fingers, feet, and toes. Statement (B) is incorrect. The first movements of the foetus are typically felt by the mother during the fifth month, which falls in the second trimester. Statement (C) is correct. By the end of the first trimester, mos