Match column A with column B with respect to human embryonic development and choose the correct option.
Column A | Column B | ||
1 | End of first month | a | Most of the major organ systems are formed. |
2 | End of second month | b | The first movements of the foetus |
3 | End of first trimester | c | Formation of heart |
4 | During fifth month | d | Eye-lids separate |
5 | End of second trimester | e | Formation of limbs and digits |