Multiple choice general knowledge Among these which one is true? Taj Mahal which is among the seven wonders of the world is in India. Taj Mahal was built over a period of 1 year India has the longest river in the world Before 1986, India was the only place in the world where Diamonds could be found. India is the third richest country in the world Reveal answer Fill a bubble to check yourself C Correct answer Explanation Before the discovery of diamonds in Brazil (18th century) and South Africa (19th century), India was the world's primary source of diamonds, particularly from the Golconda region. The question asks which statement is true among the options.