Which of the following is used as an anti knocking material?

T.E.L

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C_{2} H_{5} O H

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Glyoxal

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Freon

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Solution

The correct options are
B T.E.L
D $C_{2} H_{5} O H$
An antiknock agent is a gasoline additive used to reduce engine knocking and increases the fuel's octane rating by raising the temperature and pressure at which autoignition occurs.
The two most commonly used antiknock agent are
$(A)$ $T . E . L ⟶$ Tetraethyl lead
$(B)$ $C_{2} H_{5} O H ⟶$ Ethanol

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