The noble gas used in advertising signboards is (a) Helium (b) Neon
The noble gas used in advertising signboards is
(a) Helium
(b) Neon
(c) Argon
(d) Krypton
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The noble gas used in advertising signboards is
(a) Helium
(b) Neon
(c) Argon
(d) Krypton