Charging by Induction

Q. during charging by induction it is
1)only the charged body that shares it charges, with the object to be charged
2)the charged object as well as the earth that share their charges with the object to be charged
3)the uncharged object that is able to produce charges on itself
4)only the charged object that shares its charges with the object to be charged
Which of the following option is correct explain why

Q.

Why does a rubber balloon after being rubbed stick on a wall?

Q. If a positively charged glass rod A is touched to a neutral glass rod B, what can be said about the charge of rod B?

Q. When a negatively charged body is placed in contact with the negatively charged disc of G.L.E. its leaves ................ .

1. excess
2. rubbing
3. induction
4. diverge

Q. how can we say that charging occurs by induction?
i find that only charges present in a body rearrange themselves?
how does charging occurs? i do not get that?