Salary pay on resignation without notice period under medical reason - should I pay the basic salary or the gross salary?

Hi, I'm working in X company and my bond is going to complete on mar 18,2021. I have given resignation on Feb 20, 2021, due to medical reason(pregnant) where the doctor has insisted on complete bed rest where I could not serve the notice period for 2months. My company is asking to pay salary for those months. Should I pay the salary? If so should I pay the basic salary or the gross salary?

I have posted this query on behalf of my wife

When did your wife join the company? Please provide more details viz. DOJ, her designation,
and such other information..

she joined in March 2019, as a medical coder. Her company is into health care.
Basic: 12,432
HRA: 4973
conveyance Allowances: 800
special Allowance: 516

Why did she resign, instead of avail the maternity leave ?
Her notice pay to be calculated on the basic so she needs to pay 12432 X 2=24864. You better discuss with the management to consider the waive of period notice on humanitarian ground.