Which of the following can result in large amount of energy production? 

The correct answer is option 2):(Energy obtained by fission of 1 kg uranium )

Concept:

•  8 kWh of heat energy can be generated from 1 kg of coal. Energy obtained by burning 1500 tonnes of high-grade coal is 12,000,000 kWh.The low-grade coal will produce heat energy less than the high-grade coal.
•  12 kWh from 1 kg of mineral oil
• 24,000,000 kWh from 1 kg of uranium-235. 
• Thorium-based nuclear power generation is fueled primarily by the nuclear fission of the isotope uranium-233 produced from the fertile element thorium. The energy produced by  1 kg thorium is less than  uranium-235.
• Energy obtained by fission of 1 kg uranium can result in a large amount of energy production