Which subject do you find the most difficult? | Forum

Please indicate your class and the most difficult subject when you reply.
For Classes upto 10 the common subjects are
English
Hindi
Sanskrit
Maths
Science
Social Science
For Class XI and XII
English
Hindi
Maths
Physics
Chemistry
Biology
BioTechnology
Computer Science
Informatics Practices
History
Economics
Geography
Accountancy
Business Studies and so on.
Whichever be the subject, mention them and try to analyse which portions are difficult and why.