Answer: Option (C) is the correct answer.
Explanation:
Transition metals are the elements which have their valence electrons present in d or f-sub shell. These are also known as d-block elements.
Transition elements represent variable oxidation states that is why their behavior is not highly predictable.
Whereas elements of alkali earth metal, noble gases, and non-metal groups show similar oxidation states. Therefore, their behavior is predictable.
