86. 4-bit Register with Synchronous Reset

How do you plan to solve it?

module reg4_sync_reset (
    input        CLK,
    input        RST,
    input  [3:0] D,
    output reg [3:0] Q
);

always @(posedge CLK) begin
    if (RST) Q <= 0;
    else Q <= D;
end

endmodule