Naoh and bleach have several characteristics in common. they include all but one of the characteristics listed.
a) their ph is less than 7.
eliminate
b) they conduct electricity in solution.
c) they can be found in cleaning products.
d) they produce hydroxide ions in solution.

Sodium hydroxide and bleach have several characteristics in common and that includes: both can conduct electricity in solution, both can be found in the cleaning products and they are able to produce hydroxide ions in solution. However, their pH are not less than 7. Sodium hydroxide has a pH of 13, while bleach has a pH of 11. Therefore, both of them has a pH greater than 7. So the characteristic that they don't have in common is letter A.

Icant see the pictures 

16- counting by fours