Which four are types of functions available in SQL?

Which four are types of functions available in SQL? (Choose 4)

A.
string

B.
character

C.
integer

D.
calendar

E.
numeric

F.
translation

G.
date

H.
conversion

Explanation:
SQL have character, numeric, date, conversion function.
Incorrect answer:
ASQL have character, numeric, date, conversion function.
CSQL have character, numeric, date, conversion function.
DSQL have character, numeric, date, conversion function.
FSQL have character, numeric, date, conversion function.

Refer: Introduction to Oracle9i: SQL, Oracle University Study Guide, 3-3