Mhc molecules are used for antigen to t cells.

MHC molecules are used for antigen, which are basically derived from the pathogens to displayed them on surface of the cells to T-cell for the recognition. The major function of the MHC molecules are bind the antigens and MHC stands for major histocompatibility complex. The main role is that to displayed the peptide fragments into the T-cells.

the answer to your question is b

the transfer for conduction is the heat transfering from the liquid to the spoon

the transfer for convection is the heat rising from the liquid to the air

the transfer for radiation is the heat going through the sides of the cup and to the air

at least that is what i would do