Answer : Option C

Explanation :

Tally Vault is like a lock which is not going to show company into the list of companies, due to which your company details will not be accessible by anyone and secrecy and privacy can be maintained with the help of that feature. When company will be selected from 'select company' menu, symbol like this ************ will be shown. Thus, not showing any of the details of the company to others.
So Tally Vault is a kind of security feature built in Tally. An advanced level security feature in Tally ERP to keep up confidentiality of information by encrypting the data. Tally Vault uses a password with an advanced algorithm to validate a new user without any prior understanding of the password and the form of data is not located on the device.