Paras is changing his statement every 5 second.
Pehle Arti ko bola ki he took Arti's name because he thought Sana would save her. Then, he told Arti ki he took Arti's name because he knew that Sana wouldn't agree on her name and he wanted to show that to Arti.
Now, again he told Shukla ki he took Arti's name because he thought Sana would agree on Arti's name