Introduction:
The first newspaper published in the Bengali language was the 'Samachar Darpan'. It played a significant role in shaping the history and development of the Bengali press. This newspaper holds historical importance in spreading awareness, promoting literature, and fostering a sense of nationalism among the Bengali-speaking population.

Background:
During the British colonial rule in India, the printing press became a powerful tool for disseminating information and ideas. The first newspaper in India, 'Bengal Gazette', was published in English by James Augustus Hicky in 1780. However, it was not until the early 19th century that the Bengali language gained prominence in the print media.

Emergence of Bengali Newspapers:
As the demand for newspapers in the local language grew, several Bengali newspapers emerged. Among them, 'Digdarshan', 'Sambad Pravakar', 'Tattobodhini', and 'Samachar Darpan' were some of the notable ones.

Choice A: Digdarshan:
- 'Digdarshan' was the first Bengali newspaper to be published regularly.
- It was started by Prasanna Kumar Roy in 1818.
- While it was an important milestone in the development of the Bengali press, it was not the first Bengali newspaper.

Choice B: Sambad Pravakar:
- 'Sambad Pravakar' was the second Bengali newspaper to be published regularly.
- It was started by Ishwar Chandra Gupta in 1839, around two decades after the publication of the first Bengali newspaper.

Choice C: Tattobodhini:
- 'Tattobodhini' was a monthly magazine and not a newspaper.
- It was started by Raja Ram Mohan Roy in 1839.
- Although it played a significant role in social reform and education, it cannot be considered the first Bengali newspaper.

Choice D: Samachar Darpan:
- 'Samachar Darpan' was the first Bengali newspaper to be published.
- It was started by Serampore Missionaries in May 1818.
- The newspaper aimed to spread knowledge, promote education, and create awareness among the Bengali-speaking population.

Conclusion:
Among the options given, 'Samachar Darpan' is the correct answer as it was the first newspaper published in the Bengali language. The newspaper played a crucial role in the growth of the Bengali press and became a platform for the intellectual, social, and cultural development of the Bengali-speaking community.

Samachar Darpan is the first newspaper published in the Bengali language.