The correct answer is option 'D) I.Q.'

Explanation:
A computer is an electronic device that is designed to perform various tasks with the help of instructions called programs. It possesses several characteristics that make it a powerful tool for performing tasks efficiently. Let's discuss the characteristics of a computer and explain why 'I.Q.' is not one of them.

1. Versatility:
- Computers are highly versatile machines as they can perform a wide range of tasks. They can be used for various purposes such as data processing, calculations, communication, entertainment, etc.
- They can be programmed to perform different functions and can handle different types of data, making them adaptable to various needs.

2. Accuracy:
- Computers are known for their high level of accuracy. They can perform calculations and process data without any errors, unlike humans who are prone to making mistakes.
- They follow instructions precisely and are capable of performing complex tasks with a high degree of accuracy.

3. Diligence:
- Computers are diligent machines that can work continuously for long hours without getting tired or losing concentration.
- They can perform repetitive tasks without any decrease in efficiency, ensuring consistent and reliable results.

4. I.Q. (Intelligence Quotient):
- While computers are capable of performing complex tasks and making decisions based on programmed instructions, they do not possess human-like intelligence or an I.Q.
- Computers rely on algorithms and logical operations to process data and perform tasks, but they lack the ability to think, reason, or understand concepts in the same way humans do.

In conclusion, computers are versatile, accurate, and diligent machines that can perform various tasks efficiently. However, they do not possess an I.Q. as they lack human-like intelligence and the ability to think or reason independently.