An exam is conducted every week which is of three sections, maths, physics and chemistry. On a particular day, when all the student attended the exam. 30% students cleared cutoffs only in maths and chemistry which is thrice that of the students who cleared cutoffs in only maths and physics, which is half of that of students who cleared cutoffs in only physics and chemistry. The number of students who cleared cutoffs in only maths is the same of that of only physics which is same as that of chemistry, which is half of those who cleared cutoffs in all three sections. What is the minimum possible number of candidates who have appeared in the exam?
A. 25
B. 50
C. 100
D. 625