In the following figure, rectangle represents Opticians, circle represents Illustrators, triangle represents Photographers and square represents Football players. Which set of letters represents Football players who are both Photographers as well as Opticians?
Prohibition of discrimination on grounds of religion, race, caste, sex or place of birth comes under which category of Fundamental Rights in Indian Constitution?
Two trains are moving in opposite directions with the same speed. If the length of each train is 144 metres and they cross each other in 9 seconds, then what is the speed (in km/hr) of each train?