This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Other topics and Adverse effects, Subject name: Pharmacology
An i.v. bolus dose of thiopentone leads to loss of consciousness within 10-15 sec. The patient regains consciousness in just a few minutes. This is because it is: 
Select and explain. 
A. Renally excreted, B. Exhaled rapidly, C. Rapidly metabolised by hepatic enzymes, D. Redistributed from brain to other body tissues
D: Redistributed from brain to other body tissues
Answer: D: Redistributed from brain to other body tissues 
Explanation: (Ref: KDT 6/e p374) Thiopentone and other highly lipid soluble agent first reach the highly perfused organs like brain. therefore, onset of action of these agents is very quick. However, action also terminates quickly because of redistribution to less well perfused tissues like fat and muscle.