Which is the most difficult subject in NIT Rourkela?

This question is quite subjective in nature. My brother is in his B.Tech 2nd year at NIT Rourkela. According to him, the two most difficult subjects in the first year are the ones in which a large number of students fail. These two subjects are-

1. Mathematics 1 (MA 1001)- This subject is the nightmare of freshers who think Maths is just about problem-solving. On the other hand, Maths 1 is mostly about analysis and imagination. Some professors at NIT Rourkela teach this subject by referring to their notes which is completely opposite to the teaching approach that it requires. A large number of students fail in this subject. 
2. Basic Electrical Engineering (EE 1000)- Many students fail EE 1000 and this subject is considered difficult by all. Some students are not able to clear EE 1000 even during their summer semester. There can be two possible reasons for this- Some believe that the curriculum for this subject is difficult. Others believe that the professors do very strict checking. Both statements are true, but partially. 

These two are the most difficult subjects during your B.Tech first year at NIT Rourkela, according to my brother. My brother found MA 1001 to be quite difficult and uninteresting, however, his hard work and dedication allowed him to ace both these subjects. He did not let popular belief demotivate him and worked hard to score excellent marks in both these subjects.