Which of the following pairs of elements have alomost similar atomic radii ?

Which of the following pairs of elements have almost similar atomic radii ?

Which of the following pairs of atoms have the most similar atomic radii ?

Which of the following pair of elements have same radii?

Which of the following pairs of elements have similar atpmic radii?

Because of lanthnoid contractoin, which of the following pairs of elements have nearly same atomic radii ? (Number in the parentrhesis are atomic numbers)