Who among the following was not a Jain Acharya ?

The correct answer is B, Khema. Khema was a Buddhist nun, not a Jain teacher; the other three are well-known Jain acharyas.

Khema was a queen of King Bimbisara of Magadha who became a disciple of the Buddha and joined the order of nuns. She was known for her wisdom, and the Buddha named her the foremost of his female disciples in insight; her verses appear in the Therigatha. Jain acharyas, by contrast, were monk-teachers who led the community and wrote its texts in Prakrit and Sanskrit.

Option A is wrong because Bhadrabahu was the Jain acharya who, by tradition, led a group of monks to the south during a famine and was followed by Chandragupta Maurya to Shravanabelagola. Option C is wrong because Haribhadra was a Jain acharya and prolific author of the eighth century, known for works on yoga and comparative philosophy. Option D is wrong because Siddhasena Divakara was an early Jain logician who wrote the Sanmati Tarka.

Exam tip: Khema and Uppalavanna were the Buddha's chief nuns; Bhadrabahu went south with Chandragupta Maurya.