Pretend you are a teacher preparing a quiz for the text I will provide. 
            Each quiz question should follow the format below. 
            Ensure that you carefully recheck the questions and answers for accuracy. 
            The output should be a ready-to-use list of dictionaries for the Python eval function:

            [

                    "question": "WRITE THE QUESTION HERE",
                    "options": ["A) OPTION_1", "B) OPTION_2", "C) OPTION_3", "D) OPTION_4"],
                    "answer": INDEX_OF_CORRECT_ANSWER_IN_OPTIONS_LIST,
                    "explanation": "EXPLAIN WHY THE ANSWER IS CORRECT"

            ]

            Text:
             across a solid boundary is
of great importance in pharmaceutical processing. The system, which
frequently varies in nature from one process to another, can be divided
into constituent parts and each part characterized in its resistance to
the transfer of heat. The whole system may be considered in terms of
the equation:
Rate at which heat is transferred α Total temperature difference / Total
thermal resistance.
A hot liquid passing through a heavily lagged metal pipe may be
considered as an example.
The transfer of heat from the liquid to the pipe, conduction through
the pipe wall and across the insulation, and heat loss to the
surroundings by natural convection can each be assigned a thermal
resistance.
A system in which steam is admitted to the outside of a vertical pipe
containing a boiling liquid may serve as a second example.
This arrangement is common in evaporators, and the evaluation of
heat transfer rates demands a study of condensation, conduction
across the wall of the tube and any deposited scale, and the
mechanism of boiling.
HEAT TRANSFER THROUGH A WALL
 Heat transfer by conduction through walls follows the basic
relation given by Fourier’s equation where the rate of heat flow,
Q, is proportional to the temperature gradient, dT/dx, and to the
area normal to the heat flow, A:
As the distance, x, increases, the temperature, T, decreases. The
proportionality constant k is the thermal conductivity.
Steady non directional heat transfer through a
plane wall of thickness x and area A is
represented in Figure 5.(a) . If the thermal
conductivity does not change with temperature,
the temperature gradient is linear and equal to(T1
- T2)/x, where T1 is the temperature of the hot
face and T2 is the temperature of the cool face.
The above Equation then becomes
and it is illustrated by a composite wall in Figure
5.(b). The rate of heat transfer is the same for
both materials if steady-state heat transfer exists .
FIGURE 5. Conduction of heat through a wall
Therefore,
HEAT TRANSFER TO BOILING LIQUIDS
Heat transfer to boiling liquids occurs in several operations,
such as distillation and evaporation.
Heat is transferred by conduction and convection in a process
further complicated by the change of phase which occurs at
the heating boundary . When boiling is induced by a heater in
contact with a pool of liquid, the process is known as pool
boiling. Liquid movement is derived only from heating effects.
In other systems, the boiling liquid may be driven through or
over heaters, a process referred to as boiling with forced
circulation.
Boiling with forced circulation
In many systems, movements other than those caused by
boiling are imposed. For example, boiling in agitated vessels
is common in many batch processes.
The boiling heat-transfer coefficients depend upon
the properties of the liquid, the nature of the surface , and
the agitation. The coefficients obtained are slightly higher
than those of pool boiling.
Heat Transfer from Condensi

            Quiz: