Hi Venky,
"Gross" is the sum of basic, HRA, conveyance allowance, medical reimbursement, education allowance, and DA. CTC refers to the cost to the company, which includes gross and statutory deductions like PF, ESI, Bonus, PT.
For example, if an employee's CTC is Rs. 3,20,000/- (which includes gross and statutory deductions), then their take-home salary would be approximately Rs. 24,000/- after deducting statutory deductions.
I hope this information is helpful to you.
Regards,
Sudha