How many valence electrons do the inert gases have?
a. 1
c. 5
b. 4
d. 8

 The valence  electrons  of  inert  gases  have  is 8  ( answer   D)

explanation

Inert  gas   are  gases  found in  in group 18 in  periodic table.  They  include  helium, Neon, Argon  and krypton.

Inert gases    has  eight  valence electrons   since has eight  electron  in  outermost  shell.  

for    example  argon   with  has 2.8.8  electron configuration has  eight  valence electron.