Answer :
The transition metal is not labelled in the diagram. So, the correct option is (e).
Any element that falls under the contemporary periodic table's d-block, which includes groups 3–12, is typically regarded as a transition element. Even the lanthanides and actinides, which are members of the f-block, can be categorised as transition metals.
The transition metals are commonly referred to as the elements in the d-block (groups 3–12) of the periodic table. Cobalt, Nickel, Iron, Rhodium, Gold, Silver, Cooper, Scandium, Titanium, Vanadium, Manganese, Zinc, and Mercury are among the 38 elements that make up this group.
Therefore, the transition metal is not labelled in the diagram. So, the correct option is (e).
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