Answer:
2) His first trip abroad was to Afghanistan.
Step-by-step explanation:
Bismillah Khan was an Indian musician who popularized the shehnai, a subcontinental wind instrument of the oboe class.
The statement that is true is the second one - his first trip abroad was to Afghanistan.
The first one is incorrect because he accompanied his uncle (not his father) to the Allahabad Music Conference.
The third is incorrect because he poured his heart out into Raag Kafi from the Red Fort, not Agra Fort.
The fourth statement is also incorrect because he was called Khansaheb.