Oxidation is process which involves:
(A)- De-electronation
(B)- Electronation
(C)- Addition of hydrogen
(D)- Addition of metal

Hint: Oxidation is a process in which with the addition or removal of any species, the oxidation state of the substance who is undergoing the oxidation process is also changed.

Complete step by step answer: Oxidation process can be define in the following ways:
-In the oxidation process, addition of oxygen takes place.
-In addition with oxygen, removal of hydrogen also takes place.
-With removal of hydrogen, removal of electrons also takes place in the oxidation process which is also known as de-electronation.
-In the option (A) de-electronation is given which is true about oxidation.
-In the option (B) electronation is given which is not true about oxidation, because electronation is a process where addition of electrons takes place and that process is known as reduction.
-In the option (C) addition of hydrogen is given which is not true about oxidation, because in the reduction process hydrogen atom attaches to the element.
-In the option (D) addition of metal is given which is not true about oxidation, because in the reduction process metal atom attaches to the element.
So, in the oxidation process, de-electronation takes place according to the given options of the above question.

Hence, option (A) is correct.

Note: Here some of you may give wrong answers by getting confused on the terms oxidant & oxidation, because these two words sound similar but have opposite meanings. Oxidants are helped in the oxidation process by getting reduced itself.