Question

Si ______ a una estrella del cine, le ______ su autógrafo y lo ______ en la pared de mi cuarto.

a) conocería, pidiera, pusiera
b) pediría, conociera, poneria
c) pidiera, conocería, puesto
d) conociera, pediría, pondría

Answer 1

I would think it would be either B or C because it is saying "would" but I am not sure.

Answer 2

I'll send these two posts to our Spanish expert, SraJMcGin.

Answer 3

This is a "si" clause, when "si" means "if/whether" and the English translation could be variable.

If I knew (were to know, would knowo) a film star, I would ask for his/her autograph and I would put it on the wall of my room.

d. the "si" clause must use the -ra form of the Past/Imperfect Subjunctive, while you have a choice in the main clause = either the Conditional (which you see here) or again the Past Subjunctive.

Sra

I'll flag this in case you have other questions on "si clauses."