The correct options are
A They favoured Hinduism resulting in religious conflicts.
B Buddhism was confined only to Punjab.
The Guptas were Hindus and thus the empire followed Hinduism. They worshipped Lord Vishnu. They constructed special rooms called the deva grihas in the temples. They also believed that Lord Vishnu would come to earth in human form to help out devotees. This gave birth to the belief of Avatara. Buddhism flourished in Punjab, Bengal and Mathura. The Guptas did not discriminate between religions and often donated to buildings of worship for other religions. The rulers in the Gupta empire made sure to have harmony between Hindus and Buddhists.