Multiple Choice tweak needed Urgent Plz

First of all thanks for this wonderful plugin, Almost all my needs are fulfilled. I just need one option change in “Multiple Choice” type question. I want the plugin to mark and add points in total only when all the correct options are marked it may be (1,2,3 or all 4), if a person selects one right answer and one wrong answer in a single question having multiple right answers it should mark as wrong answer, right now it adds the points if either single right answer is selected. It should only give points when all the correct options are marked. I hope I have made my query clear.

e.g
(1) d
(2) c
(3) b
(4) a

we have 3 correct answers say 1,2,3 and 4 is incorrect. If a person selects all 3 correct answers only then the question should be marked and points should be given, if he selects 1,2,4 or 1,2,3,4 it should mark the complete question zero (0) and doesnot add point in the result for this question.

Please help… its urgent.

https://ww.wp.xz.cn/plugins/wp-pro-quiz/