The correct option is A positive charge
Answer is B.
When the atom loses electrons or gains
electrons in this process of electron exchange, it is said to be
ionized. For ionization to take place, there must be a transfer of
energy which results in a change in the internal energy of the atom. An
atom having more than its normal amount of electrons acquires a negative
charge, and is called a NEGATIVE ION. The atom that gives up some of
its normal electrons is left with less negative charges than positive
charges and is called a POSITIVE ION. Thus, ionization is the process by
which an atom loses or gains electrons.
Hence, if a material loses electrons from its outermost shell, the material acquires a positive charge.