Identify the odd one from the given below. 1. James Watt
Identify the odd one from the given below.
| 1. James Watt | Steam Engine |
| 2. 1825 | First Railway line |
| 3. Rail Engine | Stephenson |
| 4. Air pollution | Typhoid |
A) 1
B) 2
C) 3
D) 4
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