When did James Prinsep decipher Asokan Brahmi?

1838

The correct answer is Option 3  - 1838

Early scholars studying ancient inscriptions often mistakenly assumed them to be in Sanskrit, when in reality, they were written in Prakrit, an earlier vernacular language. It was only after years of meticulous investigations by several epigraphists that James Prinsep succeeded in deciphering Asokan Brahmi in 1838.