The correct option is D 90 degrees
The Earth's axis is an imaginary straight line which passes through the North Pole and the South Pole. This axis makes an angle of 90 degrees with the Equator and is perpendicular to it. Since the Equator and the Tropic of Capricorn are parallel lines, the angle formed between the Earth's axis and the Tropic of Capricorn is also 90 degrees.