Choose the correct statement from the following: A good fuel is the one which:
(A) Is readily soluble
(B) Produces a large amount of heat
(C) Leaves behind many undesirable substances
(D) Burns easily in air at a moderate rate

Hint :This question requires us to understand the characteristics and the indications of a good fuel, which can be used at a large scale and does not provide any limitations such as excessive amounts of pollution. Efficiency is the main aspect that differentiates a good fuel from a poor one. Understanding the type of fuel is necessary for industrial purposes.

Complete Step By Step Answer:
Any combustible substance, chemical, or reactant with carbon as the principal constituent that, when burned properly, provides heat that may be used economically for residential and industrial applications, as well as in the creation of electricity, is referred to as fuel.
When a fuel has a low ignition temperature and produces a substantial amount of heat, it is regarded as good or desired. Its high calorific value reflects this. Ideal fuels should be easy to store, produce little ash when burned, and combust quickly. They're cheap, easy to get, and don't have any unpleasant odors, while the fuel is simple to transport and control.
So, the correct options are (a), (b) and (d).

Note :
Fossil fuels are inexpensive. These fuels are relatively easy to source and generate, and there was a large supply. Furthermore, because fossil fuels have fueled our society for 250 years, the infrastructure to transport them affordably is already in place. As supplies deplete, the cost of locating new resources rises, and the cost of production rises dramatically. More expensive energy – not to mention a bigger cost to the environment – comes from deeper wells and mines in more inhospitable areas.