The correct option is
D for
Option B - 'With' means 'involved' or 'to be accompanied by someone or something.' 'Opportunity with education' is incorrect as it indicates that 'opportunity' is along with 'education'. Thus option B is incorrect.
Option C - 'Off' is used with actions in which something is removed or removes itself from another thing. For example, 'She cut off her hair.' As 'opportunity' can't be removed, we can't use 'off' here. Thus option C is incorrect.
Option D - We use 'to' with 'opportunity' when there is a verb after 'opportunity'. For example, 'I have the opportunity to compete against the Blues.' As 'education' is not a verb, we can't use 'to' here, Thus option D is incorrect.
Option A - We use 'for' after 'opportunity' when there is a noun after 'opportunity'. For example, 'I have the opportunity for chef's post.' As 'education' is a noun, we can use 'for' after 'opportunity'. Thus option A is the correct answer.
'Every child must get an equal opportunity for education.'