Is it anyway necessory that QnA expert should answer a question of their special category?
There is a great paucity of good question. Searching good question is like searching a needle in a haystack. Hours may pass and you might not come across a good question worth answering. Therefore, I do not feel it is necessary that QnA expert must restrict his answers to questions falling in their assigned category. They may give their expert answers in other categories as well. Those who ask good questions, I definitely make a point to answer them. For precisely this reason I have answered your question today.
