What kind of questions would NOT be recommended for framing an open book test?

Correct option is B

Correct Answer: B. Long derivations of standard formulae.
Explanation:
Open Book Tests (OBE) are designed to test higher-order skills such as analysis, application, evaluation, and problem-solving.
Option A, C, and D are all suitable because they push students to think critically, apply knowledge, and explore solutions.
Option B (long derivations) is not suitable, as it mainly checks memory and repetition. Students can easily copy derivations from textbooks, which does not align with the purpose of OBE.

Therefore, Long derivations of standard formulae should NOT be used in an open-book test.