Which One of the Following Water Solubility Guidelines A-D Is

Multiple Choice

Which one of the following water solubility guidelines A-D is not valid?

A) Salts with an alkali metal cation are soluble.
B) Salts with a nitrate anion are soluble.
C) Most ionic compounds with chloride and bromide anions are soluble.
D) Salts with the ammonium ion are soluble.
E) The guidelines A-D all are valid.