In a Pushdown Automata the transition $($q$1,$a$,$b$)=\{($q$2,$w$)\}.$ Which of the following sentences is true?

A$-$ The $$w$$ represents input symbol, $$b$$ represents pop symbol, and $$a$$ represents push string.

B$-$ The $$b$$ represents input symbol, $$a$$ represents pop symbol, and $$w$$ represents push string.

C$-$ The $$a$$ represents input symbol, $$b$$ represents pop symbol, and $$w$$ represents push string.

D$-$ The $$w$$ represents input symbol, $$a$$ represents pop symbol, and $$b$$ represents push string