This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Anaesthesia
Anesthetic agent/s which have tocolytic effect are 
Select and explain. 
A. Halothane, B. Enflurane, C. Isoflurane, D. All the Above
D: All the Above
Answer: D: All the Above 
Explanation: Halothane, enflurane, and isoflurane produce a dose-dependent decrease in uterine tone (tocolysis)Studies of isoflurane demonstrate that halogenated compounds reduce both the frequency of uterine contractions and the interval between them.(Refer: stoelting's pharmacology and physiology in anaesthetic practice, 5th edition, pg no.122-127)