In 1919 the Afghan regular army was not a very formidable force, and was only able to muster some 50,000 men. These men were organised into 21 cavalry regiments and 75 infantry battalions, with about 280 modern artillery pieces, organised into 70 batteries, in support. In addition to this, however, in a boost to the army's strength, the Afghan command could call upon the loyalty of up to 80,000 frontier tribesmen and an indeterminate number of deserters from local militia units under British command. In reality, the Afghan regular army was not ready for war. As in past years, the upper levels of the officer corps were riddled with political intrigue. In his book on the campaign, Lieutenant-General George Molesworth gave the following evaluation of the Amir's army:

Based on the above article, answer a question. Out of the 50,000 men how many cavalry regiments and infantry battalions were organized?
21 cavalry regiments