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Which is/are the popular method(s) of QBoxLayout class in PyQt?

9. Which is/are the popular method(s) of QBoxLayout class in PyQt?

1. addWidget()
2. addStretch()
3. addLayout()
4. All of the above

Answer: D) All of the above

Explanation:

All of the given methods of the QBoxLayout class. They are used for various purposes such as the addWidget() method is used to add a widget to the BoxLayout, the addStretch() method is used to create an empty stretchable box, and the addLayout() method is used to add another nested layout.