This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Central Nervous system, Subject name: Pharmacology
Which of the following if combined with rivastagmine, decreases its efficacy? 
Select and explain. 
A. Selective serotonin reuptake inhibitors, B. Reversible inhibitor of MAO-A, C. Tricyclic antidepressants, D. Atypical antidepressants
C: Tricyclic antidepressants
Answer: C: Tricyclic antidepressants 
Explanation: Rivastigmine is a acetylcholinesterase inhibitor REF: KD Tripathi 8th edition