Pick up the correct statement from the following:

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Question:
 
Pick up the correct statement from the following:

1.Alexander Parkes; a Scottish chemist prepared a hard material by mixing camphor and alcohol with nitro cellulose and called it; as Parkesite

2.Dr. L. Bakeland; a Belgian scientist prepared a product known as Bakelite

3.Pollark; an Austrian scientist prepared a substance from urea and formaldehyde and called it Plastic

4.All the above.

Posted Date:-2021-03-26 06:56:08

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