<prompt> The following phase diagram in which Liquid Beta solid solution --- Alpha solid solution shows:Eutectic alloyPeritectic alloyBothNone  <response>: The peritectic reaction is an invariant reaction that occurs at a particular composition and temperature. The reaction during the cooling process can be written as:Liquid β solid solution α solid solution Figure is the phase diagram for the Ag-Pt alloy system. The α phase is silver-rich, the β phase is platinum-rich, and the two-phase α-plus-β region results from the limited solid solubility of less than approximately 12 Ag in Pt at 700C point F of silver in platinum. Figure shows that the equilibrium solid solubility of Pt in Ag is approximately 56 at 700C. The peritectic transformation occurs at point P, where the liquid composition at B and the platinum-rich β phase composition at point D transform into the silver-rich α phase composition at point P. 