Which of the following combinations of reactants form only water and their respective salts?

a  Acids in diluted form and metal hydroxides

b  Both A and C

c  Acids in diluted form and metal oxides

d  Acids and metal carbonates/bicarbonates

can someone answer this questions?

Write the net ionic equation for the precipitation reaction that occurs when aqueous solutions of potassium hydroxide and nickel(II) sulfate are combined.

( ) (aq,s,l,g) + ( )(aq,s,l,g) + ( )(aq,s,l,g) + ( )(aq,s,l,g) = ( )(aq,s,l,g) + ( )(aq,s,l,g)

Could someone answer this in this form please and thankyou