In the sentence 'जो पढ़ेगा वह विद्वान होगा' (The one who studies will become a scholar), what type of pronoun is 'वह' in relation to 'जो'?

On a practical/general basis, how many types of pronouns are there in Hindi grammar?

Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): 'Kya' (What) and 'Kaun' (Who) are examples of interrogative pronouns (Prashnavachak Sarvanam). Reason (R): These pronouns are used in a sentence to establish a relationship between a noun and a pronoun. In the light of the above statements, choose the correct option.