Hi Manish,
If merging doesn't work for you, another workaround would be to:
1. Hide the section template with CSS (in Form Builder, in the Section
Settings dialog put a custom CSS class, and in your own CSS make elements
with the class `display: none`).
2. In the library, make all the controls in section readonly (so users won't
be able to change their value by overriding your CSS).
Would something like this work for you?