Fill in the blanks
(a) By the end of the ____ a _ - of pregnancy, the fetus develops limbs and digits.
(b) By the end of _ b the body is covered with fine hair, eyelids separate and eyelashes are formed.
(c) After c - of pregnancy, the embryos heart is formed.

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a-first month, b-second month, c-frist trimester.

a-second month, b-second trimester, c-first trimester

a-second month, b-first trimester, c-first month

a-second month, b-second trimester, c-first month

answer is D.

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Detailed Solution

In human beings, after one month of pregnancy, the embryo’s heart is formed.

By the end of the second month of pregnancy, the foetus develops limbs and digits.

By the end of about 24 weeks (end of second trimester), the body is covered with fine hair, eye-lids separate, and eyelashes are formed.

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