1. Adding heat exchanger
  2. Injecting water in/around combustion chamber
  3. Reheating the air after partial expansion in the turbine
  4. All of the above
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Answer: Option 4

The efficiency and work ratio of a gas turbine plant can be increased by -Adding heat exchanger -Injecting water in/around combustion chamber -Reheating the air after partial expansion in the turbine

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