He attributed his failure in the examination ______ tough paper.
He attributed his failure in the examination ______ tough paper.
Explanation
Attribute to is a transitive verb which means سبب قراردینا، منسوب کرنا یا نسبت دینا
Attribute to is a transitive verb which means سبب قراردینا، منسوب کرنا یا نسبت دینا