At least with the first part

The correct answer -

a. Cd and Pb(NO3)2

b. Redox reactions

c. Pb and Cd(NO3)2

Explanation:

This is the reaction known as the redox or reduction-oxidation reaction of metals. In this particular reaction, there are two reactants Cadmium (III) in solid-state and lead (II) nitrate in the aqueous state. At the end of this reaction, the products that we get are lead (II) in solid-state and Cadmium (III) nitrate in the aqueous state.

cadmium (s)+ lead nitrate (aq) = lead (s) + cadmium nitrate (aq)

Cd (s) + Pb2+(aq) → Pb(s) + Cd2+(aq)

Here, Oxidizing agent is Pb2+ and the reducing agent is Cd.

a is the correct answer