Read the passage carefully and answer the questions that follows.

New technologies speeded up various forms of communication. The printing press, telegraph, and later the microphone, movement of people and goods through steamship and railways helped quick movement of new ideas. Within India, social reformers from Punjab and Bengal exchanged ideas with reformers from Madras and Maharashtra. Keshav Chandra Sen of Bengal visited Madras in 1864. Pandita Ramabai travelled to different corners of the country. Some of them went to other countries. Christian missionaries reached remote corners of present day Nagaland, Mizoram and Meghalaya. Modern social organisations like the Brahmo Samaj in Bengal and Arya Samaj in Punjab were set up. The All-India Muslim Ladies Conference (Anjuman-E-Khawatn-E-Islam) was founded in 1914. Indian reformers debated not just in public meetings but through public media like newspapers and journals. Translations of writings of social reformers from one Indian language to another took place. For instance, Vishnu Shastri published a Marathi translation of Vidyasagar's book in Indu Prakash in 1868.

Which of the following was a key contribution of Christian missionaries during colonial rule?

Spreading education to remote corners of north-eastern states

The correct answer is Option (4) → Spreading education to remote corners of north-eastern states

The passage notes: “Christian missionaries reached remote corners of present-day Nagaland, Mizoram and Meghalaya.”

This highlights their role in spreading education and ideas to remote corners of the north-eastern states during colonial times.