Answer
(b)
Work Step by Step
The halogens are in group 17 of the periodic table.
Option (a) is incorrect. Nitrogen (N$_{2}$) is in group 15.
Option (c) is incorrect. Xenon (Xe) is a noble gas in group 18.
Option (d) is incorrect. Hydrogen (H$_{2}$) is in group 1.
Option (b) is correct. Chlorine (Cl$_{2}$) is a halogen in group 17.