The sequence in deep carious lesion close to pulp.. caoh2, GI base, varnish

The sequence in deep carious lesion close to pulp are:

a. GI base, varnish, caoh2 

b. Varnish, GI base, caoh2

c. caoh2, GI base, varnish*****

d. caoh2, varnish, GI base.