I do not think the way of putting data in local
computer would result much success. As user  tends to
access the database  directly so that result can be
easily known.
I think better way is to access  the question  through
the Access. Instead of accessing the whole question,
you may store predefined STring in client like
!. Choose the correct  questions below
which is the correct answer  etc.,
Morever, I think there is no need of constructing four
arrays.
try to use random function. So that answer can be
randomly assigned i.e., a b c d
In case local  drive, you should password protect the
Access file.

I do not think the way of putting data in local
computer would result much success. As user tends to
access the database directly so that result can be
easily known.
I think better way is to access the question through
the Access. Instead of accessing the whole question,
you may store predefined STring in client like
!. Choose the correct questions  below
which is the correct answer etc.,
Morever, I think there is no need of constructing four
arrays.
try to use random function. So that answer can be
randomly assigned i.e., a b c d
In case local drive, you should password protect the
Access file.