You can see this here.
http://www.india-forums.com/tv-show/790/afsar-bitiya/video/175411-screening-of-1st-episode-of-afsar-bitiya.htm
from minute 2 onwards...Mitali mentions Krishna as 22 - 23 year old girl.
And Zee TV USA mentions her as 22 year old girl.
http://www.zeetvusa.com/cast/afsar-bitiya.html
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