Opening a Public Provident Fund (PPF) account is a popular option for long-term savings and tax benefits in India. What is the process to open a PPF account as an individual? Can it be done online, or does it require a visit to a bank or post office? What documents are needed, and what are the eligibility criteria? Additionally, what are the minimum and maximum deposit limits, and how does the account benefit in terms of interest rates and tax exemptions? Please provide a step-by-step guide for opening a PPF account.