(A): Elements of second and third transition series have nearly same atomic radii
(R): Lanthanide contraction is observed in the elements from atomic number 58 to 71. 

Options

A. Both (A) and (R) are true and (R) is the correct explanation of (A)
B. Both (A) and (R) are true and (R) is not the correct explanation of (A)
C. (A) is true but (R) is false
D. Both (A) and (R) are false

Answer

A

Explanation

Both (A) and (R) are true and (R) is the correct explanation of (A)