The opinions is 134 lecturers of the federal University were sought to decide relevance of the three GST courses A,B,C to be floated for the student. 59 lecturer feel that course A is relevant. 57 feel that B is relevant while 58 feels that C is relevant. 15 lecturers fell that A and B are relevant. 17 lecturers feels that both B and C are relevant while 18 feels that C and A are relevant. If no lecturer feel that all the three course are not relevant. How many lecturers feels that
(A) all the GST courses are relevant
(B) at least two of the GST courses are relevant
((C) A and C only are relevant