Group I contains elementary excitations in solids. Group II gives the associated fields with these
excitations. MATCH the excitations with their associated field and select your answer as per codes
given below.Group I                            Group II(P) phonon     (i) photon + lattice vibration(Q) plasmon   (ii) electron + elastic deformation(R) polaron     (iii) collective electron oscillations(S) polariton   (iv) elastic wave