Please explain what is yatha bhuta ñaṇādassana by comparing ñaṇā with paññā? How should we understand the connection between paññā and Yathabhutañaṇādassana?

Yathabhutañaṇādassana is “seeing things as they are” which is what we do by vipassanā (bhāvnāmaya paññā). ñaṇa is knowledge or sutamaya paññā. Therefore, if you practice the three types of wisdom (sutamaya, chintāmaya and bhāvanāmaya) as we discussed, you will be practicing yathabhutañaṇādassana.