| A. Coal | P. Black, thick liquid with unpleasant smell. |
| B. Coke | Q. Formed as a result of carbonisation. |
| C. Coal Tar | R .Tough, porous black susbstance |
| D. Coal gas | S. It was used for street lighting for the first time in London |
Answer:
\[A\to Q;\text{ }B\to R;\text{ }C\to P;\text{ }D\to S\]
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