The birthplace of Vardhamana Mahavir is option 2, Kundagrama. Kundagrama is a place associated with the birth and childhood of Mahavir, who was the 24th and the last Tirthankara (spiritual leader) of Jainism. Kundagrama is located in present-day Bihar, India.

Option 1, Kusinara, is not the correct answer as it is the place where Gautama Buddha is believed to have attained Parinirvana, not the birthplace of Mahavir.

Option 3, Rajgriha, is also not the correct answer. Rajgriha, which was the capital of the Magadha kingdom, is an important place in Jain history as Mahavir spent a large part of his life there and delivered some of his teachings, but it is not his birthplace.

Option 4, Kashi, is not the correct answer either. Kashi, or Varanasi as it is commonly known, is a historically significant city in Hinduism. It is not associated with the birth of Mahavir.

In conclusion, the correct answer is option 2, Kundagrama, which is the birthplace of Vardhamana Mahavir