The correct answer to the question is option 3, Marshman.

Option 1, Harish Chandra Mukherjee, is not the correct answer. Harish Chandra Mukherjee was a prominent figure in the Indian independence movement and played a major role in the establishment of the newspaper "Hindoo Patriot" in 1853. However, he is not associated with the publication of the firstly weekly Bengali newspaper "Samachar Darpan".

Option 2, Dinabandhu Mitra, is also not the correct answer. Dinabandhu Mitra was a famous playwright and poet in Bengal during the 19th century. He is best known for his play "Neel Darpan", which highlighted the plight of indigo farmers under the British colonial rule. However, he is not linked to the publication of "Samachar Darpan".

Option 4, Vidyasagar, is not the correct answer either. Ishwar Chandra Vidyasagar, commonly known as Vidyasagar, was a renowned scholar, reformer, and writer in 19th-century Bengal. He played a significant role in the reformation of the Bengali alphabet and education system. However, he is not associated with the publication of "