Please help with 2
Answer is B
As of I remember there is a naming rxn with NaI in acetone (Finkelstein rxn)
It replaces halogen atom and forms iodide.
(Though iodine is better leaving group here is a satisfying reason why it replaces chlorine)
So you get ans B
Ignore the above statement
So sry the above English statement is wrong:
“I-replaces cl/br atom “
sn2 mechanism is prefered hence b option
Thanks @Bhuvanitha_2020 Totally forgot about Finkelstein rxn.