Ght
#of
# of
Element
symbol
| # of
neutron
Atomic
mass
proton
electron
or
s
Co
A
B
49
C
27
D
73
31
G
H
58
115
181
|
Ba-2
137
16
18
16

Hi + naoh -> h2o + nal

The question is incomplete. complete question is attached belowanswer: correct answer is option b  i.e.  solid particles  reason: filter paper has small pores, through which smaller particles can pass through. however, solid particles  have relatively larger size. hence, they are least likely to pass through.