Detailed Solution:
The correct answer is “Kushana period”.
The standing statue of Lord Buddha was primarily made in the Kushana period. This period, which lasted from the 1st to 3rd centuries CE, saw a significant development in Buddhist art, including the creation of the first anthropomorphic representations of Buddha.
While the Gupta period also saw the production of Buddha statues, the Kushana period is often considered the golden age of Buddhist art in India.