Institution: SONALI BANK LTD Exam: Sonali Bank Ltd - Assistant Programmer - 26.08.2016 ||
Topic: ICT (তথ্য ও যোগাযোগ প্রযুক্তি), Subject: Computer and ICT (তথ্য ও যোগাযোগ প্রযুক্তি)

Best Answer Explained in Below-:

The correct answer is C) Runnable because the Thread class in Java implements the Runnable interface. The Runnable interface is a functional interface that requires overriding a single method, `run()`, which contains the code that defines the task to be executed by a thread.

When a class implements the Runnable interface, an instance of that class can be passed to a Thread object, which then can be started. This design allows for better separation of tasks and thread management. Implementing Runnable is often preferred over extending the Thread class because it allows a class to inherit from other classes, promoting a more flexible and reusable design.

By invoking the `start()` method on the Thread object, the Java Virtual Machine (JVM) calls the `run()` method of the Runnable object—hence commencing thread execution. This method does not return any value and does not accept parameters, allowing it to be invoked simply when the thread starts.

In contrast, options A) Set and B) Connection are unrelated to threading in Java, making C) Runnable the only correct choice.