Which of these is a property of the line graph L(G)L(G)L(G) of a cycle graph CnC_nCn?
L(Cn)≅CnL(C_n) \cong C_nL(Cn)≅Cn
L(Cn)≅PnL(C_n) \cong P_nL(Cn)≅Pn
L(Cn)≅KnL(C_n) \cong K_nL(Cn)≅Kn
L(Cn)L(C_n)L(Cn) is a star graph