PDF chapter test TRY NOW

In the boxes of Column I the letters of some words got jumbled. Arrange them in proper form in the boxes given in Column II.
 
Answer variants:
Windmill
Smoke
Stud
Oxygen
Dust
Column I
Column II
(a) DILLMWIN
(b) YNOGXE
(c) MESKO
(d) TUDS