चंगेज खान द्वारा मंगोल साम्राज्य में स्थापित तीव्र कूरियर और संचार डाक प्रणाली को किस नाम से जाना जाता था?

Consider the following statements regarding the Keshig: (a) The most important institution created by qurultai (kuriltai) was the Keshig, which expanded to 10,000 men. (b) The body was made up of the sons and companions of Genghis Khan's commanders. (c) The Keshig served not only as a bodyguard but also as the household staff for Genghis Khan. Select the correct answer from the code given below: