Which of these method can be used to increase the capacity

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Which of these method can be used to increase the capacity of ArrayList object manually?

1. increasecapacity()
2. ensureCapacity()
3. Capacity()
4. increaseCapacity()
5. None of these

Correct Option: B

When we add an element, the capacity of ArrayList object increases automatically, but we can increase it manually to specified length x by using function ensureCapacity(p);