Explanation:

First two ornaments are worn by men only i.e

Takhti – a flat square plate engraved with figures etc.
Zanjiri – a set of chains.

Last two are worn by womens only i.e

Mala – a plain necklace of pearls or gold bead, hanging down long.

Atradan – a square jeweled or plain gold pendant attached to a silk chain.

But all the four are being worn on neck.