I'm from Kochi, India (southern part of India). I found this bug inside my house , it was about a centimeter long . But how can such an hybrid be possible. (It was raining before I found it).
This is a long-legged fly (Condylostylus spp). Unfortunately your image is not sharp enough to give a specific species. See this post of another Indian fly that is virtually identical to yours: https://www.jungledragon.com/image/13762/long-legged_fly_-_condylostylus_spp.html