Kyunki Saas Bhi Kabhi Bahu Thi

The Viranis worry as the case grows stronger against Karan. While Nandini doubts Karan of taking Gujral's life, Tanya reveals to Meera that Karan was with her at the time of his murder. Meera hopes to save Karan with Tanya's statement. Who killed Gujral?