Correct option is A
Information Booster:
Statement (a) A few Gupta kings were worshippers of Lord Shiva - True.Although most Gupta rulers, like Samudragupta and Chandragupta II, were Vaishnavites (devotees of Vishnu), some Gupta rulers and members of the royal family also worshipped Lord Shiva.The Gupta period promoted multiple Hindu deities including Shiva, Vishnu, and Devi.
Statement (b) Idol worship in the temples became a common feature of Hinduism from the Gupta period onwards - True .The Gupta period (4th–6th century CE) saw the institutionalization of idol worship and temple building.Temples dedicated to Vishnu, Shiva, and other deities began to emerge during this time.
Statement (c) Gupta kings followed a policy of tolerance towards different religious sects - True.Gupta rulers patronized Hinduism, but they were tolerant toward Buddhism and Jainism as well.Fa-Hien, the Chinese traveler who visited India during Chandragupta II’s reign, recorded the peaceful coexistence of different religious groups.