Yes, You can apply for Bank PO, As per the eligibility to apply for the exam you should be Graduate in any of the field. If you are planning to apply IBPS Bank PO,  A general category candidate must be 20-30 years of age. You can check the detail with the given below link.

https://competition.careers360.com/articles/ibps-po-eligibility-criteria

If you are planning any other Bank PO exam, then let me know.

Good Luck!