Verdict
Yes — you can hold India and South Africa citizenship simultaneously.
India
Dual citizenship policy
OCI card (not full dual citizenship) — grants lifelong residency, work, study, and property rights in India but NOT voting rights, public office, or Indian passport.
South Africa
Dual citizenship policy
Permitted — South Africa allows dual citizenship (must apply for retention before acquiring another nationality).
Both India and South Africa permit dual citizenship. You can acquire, hold, and use both passports simultaneously without legal restrictions.
This assessment is based on each country's current nationality law. Dual citizenship rules can change — always verify with the relevant consulate or an immigration attorney before making decisions about renunciation or acquisition.