In which of the following process, convection does not take place primarily

In which of the following process, convection does not take place primarlily?

In which of the following processes,convection does not take place primarily? (a)Sea and land breeze (b)Boiling of water (c)Warming of glass of bulb due to filament (d)Heating air around a furnace.

In which of the following , Convection of heat does not take place ?

Which of the following reaction does not take place at cathode ?