Final answer:
An a:b T Cell is indeed restricted to recognition of antigens through MHC molecules.
Step-by-step explanation:
T cells recognize antigens through their T cell receptors (TCR) which are involved in the recognition of processed foreign epitopes presented with MHC I or MHC II molecules.
The T cell receptor binds to antigens presented with MHC molecules, allowing the T cell to respond to specific antigens.
Therefore, the statement that 'An a:b T Cell is restricted to recognition of antigens through MHC molecules' is True.