Option 1: Buddha was born - This is a significant event in Buddhism as it marks the birth of Gautama Buddha, the founder of Buddhism. The birth of Buddha is celebrated on the full moon day of VaishakhaPoomima.

Option 2: Buddha got enlightened - This is another important event in Buddhism. It is believed that on the full moon day of VaishakhaPoomima, Gautama Buddha attained enlightenment under the Bodhi tree. This event is known as the Bodhi or Enlightenment Day.

Option 3: Buddha died - This is the final event in Buddha`s life, known as Parinirvana. According to Buddhist tradition, Gautama Buddha passed away and attained complete liberation on the full moon day of VaishakhaPoomima.

Option 4: All of the above - This option is the correct answer as all three events mentioned (birth, enlightenment, and death) hold great significance in Buddhism and are commemorated on VaishakhaPoomima. These events form important milestones in the life and teachings of Gautama Buddha.