Lead (II) chloride+ potassium nitrate
PbCI2+KNO3(B)
Hello I took this test just now and got 100% your correct answer would be C. Hope this helps.

Actually Welcome to the concept of Ions .
If we see the reaction.
H2SO4 ==> 2H+ + (SO4)2-
Here you can see, H+ ( Hydrogen ions) and (SO4) 2- ( sulphate ions) are the ions when the H2SO4 is dissolved in water.
I was going to help but I don’t understand the question