Step 1: Gupta Rulers' Context.
The Gupta period (4th–6th century CE) saw support for Hinduism, Buddhism, and Jainism. Inscriptions are crucial for linking rulers to specific faiths.
Step 2: Budhagupta's Inscriptions.
Budhagupta's inscriptions, located at Mathura and other Jain sites, highlight Jainism's importance. These records show royal recognition of Jain shrines and activities.
Step 3: Option Elimination.
- (A) Skandagupta: Known for defense against Huns, but no Jain records link.
- (B) Budhagupta: Correct, inscriptions mention Jainism.
- (C) Purugupta: Limited inscriptional evidence regarding Jainism.
- (D) Jivitagupta: Associated with later Gupta rulers, not Jain inscriptions.
Step 4: Conclusion.
Budhagupta's inscriptions explicitly mention Jainism, confirming him as the answer.