Explanation:

Statement 1 is correct: Efficiencies in the industrial sector in particular can be achieved in the following ways: Forecasting energy demand and managing the output accordingly like Managing power grids. Some AI applications are designed to handle multiple energy sources such as solar, wind and fossil fuels.

• Source: http://maximpactblog.com/ai-can-cut-energy-consumption/#:~:text=Using%20AI%20in%20the%20industrial%20sector&text=Efficiencies%20in%20the%20industrial%20sector,and%20managing%20the%20output%20accordingly.&text=Managing%20power%20grids.,solar%2C%20wind%20and%20fossil%20fuels.

Statement 2 and 4 is correct: Even the most advanced chatbots can’t hold a decent conversation, but AI systems are definitely getting better at generating the written word. A new web app provides ample proof, letting anyone enter a text prompt to which AI software will automatically respond.

• Source: https://www.forbes.com/sites/bernardmarr/2019/03/29/artificial-intelligence-can-now-write-amazing-content-what-does-that-mean-for-humans/#4c89293850ab

Statement 3 is correct: AI-based software can tell whether a patient has a certain disease even before evident symptoms appear. In their latest research, Google proves that a neural network can be trained to detect signs of lung cancer earlier and faster than trained radiologists. 

• Source:http://https://www.technologyreview.com/2019/05/20/135287/google-shows-how-ai-might-detect-lung-cancer-faster-and-more-reliably/

Statement 5 is correct: You can couple two systems to recharge one of them via electromagnetic field. The area remains underdeveloped but it has been shown to be technically possible.

• Source:https://roboticsandautomationnews.com/2020/01/26/when-it-comes-to-wireless-transmission-power-must-catch-up-with-data-in-industry-4-0/29094/

Note: Artificial Intelligence is an ongoing technology. Therefore, each entity mentioned above has a evolution or advent in their sphere.

Hence option 4th is correct.