An examination consists of 160 questions. One mark is given for every correct option. If one- W ...

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An examination consists of 160 questions. One mark is given for every correct option. If one-
W fourth mark is deducted for every wrong option and half mark is deducted for every question left, then one person scores 79. And if half mark is deducted for every wrong option and one-fourth mark is deducted for every left question, the person scores 76, then find the number of questions he attempted correctly.
(a) 80
(b) 100
(c) 120
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