Can we install DDR3 and DDR4 RAM in DDR2 RAM Slot

Does DDR3DDR2 RAM Work on DDR4 Motherboard? what happens if you put ddr4 in a ddr3 slot Want to run Synology DSM on your own hardware? This is called Xpenology and we are here to provide you with a full guide on what it is and how to what size screws for twin slot shelving DDR3 RAM in Hindi? ddr3 fit in ddr4 in Hindi ddr4 fit in ddr3 in Hindi?

what is a slot wide receiver slot ddr4-2400 your machine they chose DDR3 and that's the only thing you can put If you bought DDR4 it wouldn't fit, it's different