Which of the following combination of terms has no fossil fuel?(a) wind, ocean, coke (b) kerosene, tide, wind (c) wood, wind, sun (d) petrol, wood, sun

Correct Answer: (c) wood, wind, sun

Explanation:

 In option (a), (b) and (d), coke, kerosene and petrol are fossil fuels respectively, while in wood, wind and sun, none of the three is fossil fuel.

Fossil fuels are the natural fuels that are found deep inside the earth and are formed from the prehistoric remains of the organisms.

The plants and animals which died millions of years ago got buried deep inside the earth, in the absence of oxygen got converted into fossil fuels such as coal, petroleum and natural gas, due to the chemical effects of bacteria along with continuous pressure and heat. The buried remains of large plants get converted into coal and the remains of small plants and animals into petroleum and natural gas.