How do you plan to solve it?
module selector3(input [7:0]a,b,c, input [1:0]sel, output reg [7:0]y ); always @ (*) begin if(sel == 2'b00) y = a; else if(sel == 2'b01) y = b; else if(sel == 2'b10) y = c; else y = 8'h00; end endmodule