The sun is vertical over the Tropic of Capricorn on which of the following date?

22 December

The correct answer is Option (3) - 22 December

During December 22^nd the suns vertical rays strike the Tropic of Capricorn, 23.5 degrees south of the Equator. The December solstice is the shortest day of the year (winter solstice) in the Northern Hemisphere and the longest day of the year (summer solstice) in the Southern Hemisphere.