Thanks a lot respected Garg sir, for your response.
I have visited across the links on the page provided by you and it does not seem a satisfactory match. Flower size is very smaller in my posted plant in comparison to that in the photos and description in the links provided. Although I'm not an expert, but according to me, flowers are not observed to vary in size to this extent, leaves usually vary in size. So, we have to research more about this plant and expert's advice is required.
Regards,
Yogesh Sharma