The correct answer is: A. Kabul
When Babur invaded India in 1525, Humayun was the Governor of Kabul. Kabul was the capital of Babur’s empire and the base from which he launched his invasion of India. Humayun was a capable administrator and military commander, and he played a key role in the success of Babur’s campaign.
Option B, Fargana, was a province in Central Asia that was ruled by Babur’s father, Umar Shaikh Mirza. Humayun was born in Fargana in 1508.
Option C, Badakhshan, was another province in Central Asia that was ruled by Babur’s father. Humayun spent some time in Badakhshan as a child.
Option D, Herat, was a city in Central Asia that was ruled by Babur’s uncle, Mirza Muhammad Haidar. Humayun lived in Herat for a time as a young man.
In conclusion, the correct answer is: A. Kabul