Why would Ridz blame Armaan?? She isn't that cruel and anyway he was the only one of the 5 who wasn't with Dhoni's grandad and not only does Ridz know that but also Kirti, because he was with Kirti when they got the call about Dadu.
What I think will happen is that Dadu will have had a reaction to some medicine, and because Ridz injected him everyone will think it was her, and Armaan will get angry at this and she will be guilt ridden thinking it's all her fault. But it won't be her fault...we don't know what treatment Anjie gave him as one min she was running to him and the next he was ok. đ So I think, because she was so preoccupied thinking about Ridz and Padma it was her fault, but this won't be discovered until later.
Anu