Step 1: Understanding the question.
The question asks about the year in which Reverend R. Ramke passed away. This relates to the missionary timeline in Garo Hills.
Step 2: Historical background.
Reverend R. Ramke was one of the earliest missionaries who worked among the Garo people, contributing to religious and educational reforms.
Step 3: Analysis of timeline.
Based on missionary records, Reverend Ramke’s death is recorded in the year 1873, marking an important event in the spread of Christian education in the region.
Step 4: Conclusion.
Therefore, the correct answer is 1873.