How do you plan to solve it?
module selector3(input [7:0]a,input[7:0]b,input[7:0]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