Question: Which of the following is true about abstract classes injava? //Pick one or more options 1. Abstract classes can be used as just any other

Which of the following is true about abstract classes injava? //Pick one or more options

1. Abstract classes can be used as just any other class

2. Abstract classes need to be declared with 'abstract'keyword

3. Abstract classes cannot be instantiated

4. A class containing at least one abstract method will be anabstract class

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