What is the effect of doping and temperature on energy band gaps of semi conductors

Doping densities cause band gap to shrink; rise in temperature will decrease band gap

Both doping and  increase in temperature  causes exponential  increase in energy of band gap

Doping  has no effect on energy of  band gaps,  while increase in temperature causes increase in energy of band gaps

Both  doping and temperature  has no effect on energy band gap