What connects?

Cracked by everyone!

shenoyvarun86, udupendra, p vs np, Gurupad, Raghuvansh, Dibyo, dheeraj, shrik, varuns88, byslexia, joe, Chinmaya U.Holla, Rogi, Abhishek, umang, Ps, Ananth, Logik, madhur, sidsen, Saswata Das, Kaushik Saha and Shrey Goyal