Warming of glass of bulb is due to the radiation coming from hot filament of bulb not due to convection.
The remaining three options A , B and C are results of convection.
A
The air above the land warms up and rises and the cool air over the sea moves in to take its place, resulting in the sea breeze in the daytime. At night, as the sea maintains its temperature better and is warmer than the land, the roles of land and sea reverse and convection of air results in the land breeze.
B
When boiling water, the temperature of molecules within the water increases and they slowly begin to move at a rapid rate, upwards. These molecules produce kinetic energy. The hot water molecules become less dense, and they rise above the denser cooler molecules. This movement of molecules creates convection currents. Boiling water is an example of forced convection.
C
A furnace is very hot from inside.The air from around the furnace gets heated and expands and rises above and cooler air from surroundings take this place.And this processes goes on and on .Hence this is also a result of convection.