The correct answer is: A. Silver nitrate
Silver nitrate is a chemical compound with the formula AgNO3. It is a white, water-soluble crystalline solid that is widely used in photography, electroplating, and medicine. Silver nitrate is also the main compound of voter ink.
Ammonium chloride is a chemical compound with the formula NH4Cl. It is a white, water-soluble salt that is used in a variety of industrial and commercial applications. Ammonium chloride is not used in voter ink.
Silver chloride is a chemical compound with the formula AgCl. It is a white, water-insoluble solid that is used in photography and as a catalyst. Silver chloride is not used in voter ink.
Ammonium nitrate is a chemical compound with the formula NH4NO3. It is a white, water-soluble salt that is used as a fertilizer, explosive, and propellant. Ammonium nitrate is not used in voter ink.
Voter ink is a type of ink that is used to mark the fingers of voters in order to prevent them from voting more than once. Voter ink is typically made from a solution of silver nitrate, which is a compound that is known to be permanent and difficult to remove.