3. Multiple Drivers

How do you plan to solve it?

module top_module(
    input a, 
    input b, 
    output y
);

    // 1. Assign the value of 'a' to 'y'
    assign y = a;
    
    // 2. Assign the value of 'b' to 'y'
    assign y = b;

    // Both continuous assignments are active simultaneously, 
    // driving the wire 'y'.

endmodule