At which of the following places did Lord Buddha attain enlightenment?

Bodh Gaya

The correct answer is Option 3- Bodh Gaya

Lord Buddha attained enlightenment at Bodh Gaya, India.

Bodh Gaya is a religious site and place of pilgrimage associated with the Mahabodhi Temple Complex in Gaya district in the Indian state of Bihar. It is famous as it is the place where Gautama Buddha is said to have attained Enlightenment (Pali: bodhi) under what became known as the Bodhi Tree. Since antiquity, Bodh Gaya has remained the object of pilgrimage and veneration both for Hindus and Buddhists. In particular, archaeological finds including sculptures show that the site was in use by Buddhists since the Mauryan period.