Multiple choice What is the full form of “ISTRAC”? ISRO Telemetry, Tracking and Command Network ISRO Telemetry, Tracking and Change Network Indian Telemetry, Tracking and Command Network None of these Reveal answer Fill a bubble to check yourself A Correct answer Explanation ISTRAC stands for ISRO Telemetry, Tracking and Command Network, which provides mission support to ISRO's satellites and launch vehicles。'Change'是错误的，选项C中的'Indian'也错误 - 缩写中代表ISRO（印度空间研究组织）。