Serial subtraction is used to test: (A) Working memory, (B) Long term memory, (C) Mathematical ability, (D) Recall power
Answer is A. Working memory- Digit Span test & serial subtraction.Long term memory- bih, high school, marriage details, etc. DST & Serial subtraction are usually tested for concentration., here correct option is working memory. Reference: Syanopsis of Psychiatry, page 203.