Concept:The Rohini RH-200 is a sounding rocket used by ISRO for atmospheric and scientific studies.Explanation:In November 2022, ISRO achieved a special milestone with the RH-200 sounding rocket.This mission marked the 200th consecutively successful launch of this rocket.The launch was conducted from the Vikram Sarabhai Space Centre in Thiruvananthapuram, Kerala.Hence, the blank must be filled with "200th".Answer:Option C. 200th