_Which of the following rectifiers are primarily used for charging of low voltage batteries from AC. supply?$?

_Which of the following rectifiers are primarily used for charging of

1.	_Which of the following rectifiers are primarily used for charging of low voltage batteries from AC. supply?$?
A.	Mechanical rectifiers
B.	Copper oxide rectifiers
C.	Selenium rectifiers
D.	Electrolytic rectifiers
Answer» E.