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Olympiad-Science
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Class 8
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Q)
Which of the following groups contain all synthetic substances?
(
a
)
N
y
l
o
n
,
T
e
r
y
l
e
n
e
,
W
o
o
l
(
b
)
C
o
t
t
o
n
,
P
o
l
y
c
o
t
,
R
a
y
o
n
(
c
)
P
V
C
,
P
o
l
y
t
h
e
n
e
,
B
a
k
e
l
i
t
e
(
d
)
A
c
r
y
l
i
c
,
S
i
l
k
,
W
o
o
l
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