Which Foundation Day has Defense Research and Development Organization (DRDO) celebrated on 01 January 2025? रक्षा अनुसंधान एवं विकास संगठन (DRDO) ने 01 जनवरी 2025 को कौन सा स्थापना दिवस मनाया है?

Official answer & explanation

A 50th

B 60th