First International Peace Congress was held in London in

The correct answer is: C. 1843 AD

The First International Peace Congress was held in London in 1843. It was organized by the Peace Society, a British organization founded in 1816 to promote peace and non-violence. The congress was attended by delegates from 26 countries, including the United States, France, Germany, and Russia. The delegates discussed a variety of topics related to peace, including disarmament, arbitration, and education for peace. The congress was a significant event in the history of the peace movement, and it helped to raise awareness of the need for peace and non-violence.

The other options are incorrect because:

• Option A is incorrect because the First International Peace Congress was held in 1843, not 1564.
• Option B is incorrect because the First International Peace Congress was held in 1843, not 1798.
• Option D is incorrect because the First International Peace Congress was held in 1843, not 1901.