The capital of British India was transferred from Calcutta to Delhi in the year

Answer: Option A

The capital of British India was transferred from Calcutta (now Kolkata) to Delhi in the year 1911. The announcement to shift the capital was made during the Delhi Durbar (a grand imperial gathering) held in December 1911 to commemorate the coronation of King George V.

The shift of the capital was a part of the larger plan to move the administrative center closer to the northern parts of India. The new capital in Delhi was known as New Delhi and was designed by the architect Edwin Lutyens. It became the center of British colonial administration in India.

Therefore, the correct option is Option A: 1911, when the capital of British India was transferred from Calcutta to Delhi.