Introduction:
This analogy of "Computer : CPU :: Human : ?" is asking us to find the relationship between a computer and its central processing unit (CPU), and then identify a similar relationship between a human and a corresponding organ.

The Relationship between a Computer and its CPU:
The CPU, or central processing unit, is often referred to as the "brain" of a computer. It is responsible for executing instructions and performing calculations, making it a crucial component of the computer's functioning. Without a CPU, a computer would not be able to process information or carry out tasks.

Identifying the Relationship between a Human and an Organ:
To find a similar relationship between a human and an organ, we need to look for an organ that plays a central role in the human body, much like the CPU does in a computer. Let's consider the options provided:

a) Lung: While the lungs are essential for breathing and oxygen exchange, they do not have a central control function like the CPU.

b) Stomach: The stomach is responsible for digesting food, but it does not have a central control function like the CPU.

c) Heart: The heart, on the other hand, can be considered the central control organ of the human body. It pumps blood, which carries oxygen and nutrients to all parts of the body. Without the heart, the body cannot function properly, just like a computer cannot function without a CPU. Therefore, the correct answer is option 'C' - Heart.

d) Intestine: The intestines play a crucial role in digestion, but they do not have a central control function like the CPU.

e) None of these: This option is incorrect because the relationship between a human and an organ can be established, and the correct answer is option 'C' - Heart.

Conclusion:
In conclusion, the relationship between a computer and its CPU can be compared to the relationship between a human and their heart. The CPU acts as the central control unit of a computer, just as the heart acts as the central control organ of the human body.