Explain, how is the electronegativity of carbon atoms related to the state of hybridisation in an organic compound ?

What is the state of hybridisation of carbon in?

Electronegativity of carbon atoms depends upon their state of hybridisation in which of the following compounds the carbon marked asterisk, is most electronegative ?

Electronegativity of carbon atoms depends upon their state of hybridisation. In which of the following compounds, the carbon marked with asterisk is most electronegative?