Consider the following statements with reference to the Periodic Table of chemical element
1. Ionisation potential gradually decreases along a period.
2. In a group of element, electron affinity decreases as the atomic weight increases.
3. In a given period, electronegativity decrease as the atomic number increases.
Which of these statement(s) is/are correct?

A. Only 1

B. Only 2

C. 1 and 3

D. 2 and 3

Answer: Option B