c) DECIMAL
DECIMAL is not a valid SQL type because it is nothing but numeric only in SQL.
NUMERIC has fixed precision, and scale numbers range from -10^38+1 to 10^38-1.
FLOAT has floating precision number ranges from -1.79E + 308 to 1.79E + 308.
CHARACTER is a fixed-width character string data type that can be up to 8000 characters.
