Yeah soofia,
Salary depends purely on negotiation between the employer and the employee. So it differs, and kept confidential. But the established fact is, it can not pay less than 30% or more than 60%. If you claim 40000/- as your basic pay, and the HR limited to pay 60000/- gross to the employee during negotiation, then they adjust with the amount reducing other benefits so that it does not exceed the amount prescribed by the management. So that they can retain the employee...
Yes. if you want the Salary slip, then it's your right. (but some companies cover it off in there relieving formalities, just by mentioning the salary drawn, adjusting with the banking transactions, so proof of salary drawn is important).