Four test tubes marked I, II, III and IV were taken. A piece of zinc metal was placed in test tube I, an iron nail was put in test tube II, copper turnings were put in test tube III and a clean aluminium strip was placed in test tube IV. 20 ml of $A{l}_2(S{O}_4{)}_3$ solution in water was poured in each of the test tubes. No change was observed in any of the test tubes. The correct inference drawn is :

(a) Copper is more reactive than Aluminium.

(b) Zinc is more reactive than Aluminium.

(c) Zinc is more reactive than Copper.

(d) Zinc, Iron and Copper are less reactive than Aluminium.