4) If there is no Loan facility, then how much I can withdraw as partial withdraw scheme?
As per query 2 answer. There are three types of surrender options available under this plan -
1- Surrender Value
2- Guaranteed Surrender Value
3- Special Surrender Value

5) Finally, which option is better whether partial withdraw OR Loan?

I Hope You can resolve my issue soon. Waiting for your response....

Thanks
Both options are not available - partial withdraw OR Loan.
But partial surrender option is there, you can check that with any LIC Branch or LIC Call center.