test.sol

// SPDX-License-Identifier: UNLICENSED
pragma solidity ^0.8.18;

contract A{
    address public caller;
    address public d;
    address public c;
    address public b;

    constructor(address _d, address _c, address _b) {
        d = _d;
        c = _c;
        b = _b;
    }

    function go() public {
        b.delegatecall(abi.encodeWithSignature("go()"));
    }
}
contract B{
    address public caller;
    address public d;
    address public c;
    address public b;

    constructor(address _d, address _c, address _b) {
        d = _d;
        c = _c;
        b = _b;
    }

    function go() public {
        c.delegatecall(abi.encodeWithSignature("go()"));
    }
}
contract C{
    address public caller;
    address public d;
    address public c;
    address public b;

    constructor(address _d, address _c, address _b) {
        d = _d;
        c = _c;
        b = _b;
    }

    function go() public {
        // caller = msg.sender;
        d.call(abi.encodeWithSignature("go()"));
    }
}
contract D{
    address public caller;
    address public d;
    address public c;
    address public b;

    constructor(address _d, address _c, address _b) {
        d = _d;
        c = _c;
        b = _b;
    }

    function go() public {
        caller = msg.sender;
    }
}