Is antimatter also attracted by gravitational field? As we all know matter is attracted by the gravitational field of black hole. So, my question is: Is there any possibility of a black-hole attracting antimatter?

Can you explain how/why please?
Yes, common believes are because gravitation has effect on particles with mass. Antimatter are equivalent to there counterpart, sharing the same mass but opposite charges. Therefore, antimatter is attracted by gravitation.
But, this is still not experimentally proven, therefore a more theoretical explanation of the gravitational interaction.
Some researches indeed suggest anti-gravitational interaction between matter and antimatter.

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