Chemistry · Classification of Elements and Periodicity in Properties

Given below are two statements: Statement I: The atomic radius generally decreases across a period from left to right due to an increase in effective nuclear charge. Statement II: The atomic radius increases down a group because the principal quantum number (\( n \)) increases and inner core electrons shield the valence electrons. In the light of the above statements, choose the most appropriate answer from the options given below:

1. A
   Both Statement I and Statement II are correct.
2. B
   Both Statement I and Statement II are incorrect.
3. C
   Statement I is correct but Statement II is incorrect.
4. D
   Statement I is incorrect but Statement II is correct.