Which of the following os a true statement about the periodic table?

Question

A. periods form horizonal rows;groups form vertical columns
B. groups form horizontal rows;periods form vertical columns
C. catagories form horizontal rows;gases form vertical columns
D. gases form horizontal rows; catagories form vertical columns

Answer 1

would the answer be B?

Answer 2

A is a true statement.
B is not a true statement.
Periods form rows; groups form columns.

Answer 3

What is periodicity