Interrogative Pronouns

Question 1

What are the only forms which differ from the relative pronouns or interrogative adjectives?

Answer 1

Masc, nom, sing => from qui to Quis

Fem, nom, sing => from Quae to Quis

Fem, acc, sing => from quam to quem

Neuter, nom, sing =) from Quod to Quid

Neuter, acc, sing =) from quod to Quid