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     EduGorilla 
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    A scientist is trying to find a cure for the Ebola using four ingredients. He can choose from the stable chemicals hydrogen, helium and lithium and the unstable chemicals Neon, Argon, Radium and Chlorine. In order for the formula not to explode, there must be two stable chemicals in it. Also, certain chemicals cannot be mixed because of their reaction together. Helium cannot be mixed with Neon. Lithium cannot be mixed with Radium. Radium cannot be mixed with Chlorine.

    The scientist rejected Helium because of its possible side effects but decided to use Chlorine. Which is a possible combination of the four ingredients in the formula?

    Options :-

    1. Hydrogen, Neon, radium and Chlorine
    2. Hydrogen, Lithium, Neon and Chlorine
    3. Hydrogen, Neon, Argon and Chlorine
    4. Hydrogen, Argon, radium and Chlorine
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