The correct answer is: A. Colonel Dalton
Colonel Dalton was a British officer who served in India from 1849 to 1872. He was a keen amateur archaeologist and made many important discoveries in the field of Indian art and archaeology. In 1855, he discovered a large number of Jain idols in Pakwira and near Kasai rivers. These idols are now housed in the Indian Museum in Kolkata.
Dr. P. C. Majumdar was an Indian historian who specialized in the study of ancient India. He was the director of the Archaeological Survey of India from 1950 to 1956. He did not discover any Jain idols in Pakwira and near Kasai rivers.
Dr. B. L. Bhist is an Indian archaeologist who specializes in the study of Jain art and archaeology. He has not discovered any Jain idols in Pakwira and near Kasai rivers.
S. N. Sinha is an Indian historian who specializes in the study of medieval India. He did not discover any Jain idols in Pakwira and near Kasai rivers.