How do you know if a transistor is a PNP or an NPN?

To know if a transistor is PNP or an NPN,the following should be verified:

1. For a PNP transistor, the base-collector junction is forward biased while the base-emitter junction is reversed biased.
2. For an NPN transistor, the base-emitter junction is forward biased while the base -collector junction is reversed biased.