The correct answer is (c) In 26 Lacs.
The Diwani of Bengal, Bihar and Orissa was granted by the Mughal Emperor Shah Alam II to the East India Company in 1765 in exchange for a yearly regular payment of 26 lakhs of rupees. This was a significant event in the history of the British East India Company, as it gave them control over the revenue collection of these three provinces. This control over revenue collection gave the Company a great deal of power in these provinces, and it was a major step towards the Company’s eventual control over India.
The other options are incorrect. Option (a) is incorrect because the yearly regular payment was 26 lakhs of rupees, not 10 lakhs of rupees. Option (b) is incorrect because the yearly regular payment was 26 lakhs of rupees, not 20 lakhs of rupees. Option (d) is incorrect because the yearly regular payment was 26 lakhs of rupees, not 30 lakhs of rupees.