Which one of the following is a 'd-block element' ?

Which one of the following is 'd'-block element?

Which one of the following is an s-block element?

Which one of the following is an s-block element?

Which one of the following is an s-block element?

Which of the following is not a d-block element?

Which of the following is a 'd' block element ?

Out of the atomic numbers given below suggest which one of the following will be d-block element and name the element. (Atomic number 12, 13, 18 and 28 )

Which one of the following given d-block elements has the lowest atomic radii?