Institution: Bangladesh Bank Exam: Officer (General) -Ansar VDP Unnayan | BD House Building Finance Corporation 28.09.2018 ||
Topic: Intelligence Quotient (IQ), Subject: IQ Mental skills (মানষিক দক্ষতা)

Best Answer Explained in Below-:

To solve the problem, we analyze the given information piece by piece:

1. **A’s Details**: A studies in the 5th standard and likes Maths, with only one other friend who likes Bangla (therefore, A and this friend must study in the 5th standard).

2. **I's Details**: I studies with two friends who like languages, which can only be Science, English, or Bangla. Since A’s friend likes Bangla, I cannot study in the 5th standard and must be in the 6th or 7th.

3. **D’s Details**: D studies in the 6th standard with one person and doesn’t like Civics. Hence, D also cannot be I’s friend.

4. **E’s Details**: E studies with one other friend. The one who likes History must therefore be in the 7th standard since they do not study in the 5th or 6th.

5. **C’s Details**: C doesn't like English, Science, or Civics, which leaves only History or Economics as possible options.

From the clues, it turns out that E must study in the 6th standard and since E mentions not liking languages, the only suitable favorite subject for E is Civics. The reasoning leads us to conclude that E's favorite subject is Civics, and he studies in the 6th standard, matching option C: "Civics and 6th." This fits all conditions outlined in the problem.