i definitely think it was anji. i think ridhimma will take the blame for anji or armaan will take it thinking it was ridz. it would be too obvious if it was ridhimma. and remember at one point ridz looks at anji as if expecting her to confess. and she won't do it. also remember that anji was too quick to answer to atul's questions and too quick to change subjects. it's definitely her.