स्कूल की बसों का रंग पीला क्यों होता है

https://upload.wikimedia.org/wikipedia/commons/0/03/School_bus%2C_Indore.jpg
https://upload.wikimedia.org/wikipedia/commons/8/81/Islamic_Public_School_bus_in_Leh_7_%28Friar%27s_Balsam_Flickr%29.jpg
https://live.staticflickr.com/8163/7637615960_3e65a653a6_b.jpg
https://live.staticflickr.com/8157/7354715958_943586519b_b.jpg
https://upload.wikimedia.org/wikipedia/commons/9/90/DeSoto_County_MS_school_bus_2012-04-01_001.jpg
https://upload.wikimedia.org/wikipedia/commons/d/d9/Barbados_Midibus2.jpg
https://upload.wikimedia.org/wikipedia/commons/1/18/Arrival_of_Scholarship_Holders_-_Wiki_Conference_India_-_Chandigarh_International_Airport_-_Mohali_2016-08-04_5872.JPG
https://pixabay.com/photos/school-bus-bus-orange-school-946671/
https://pixabay.com/photos/bus-new-york-city-school-yellow-3994719/
https://pixabay.com/photos/auto-transport-system-vehicle-bus-3331296/
https://pixabay.com/photos/bus-school-bus-vehicle-america-usa-2759073/
https://pixabay.com/photos/school-buses-houston-texas-teachers-2801134/
https://pixabay.com/photos/school-bus-bus-vehicle-yellow-2645085/
https://pixabay.com/photos/school-bus-america-yellow-2122395/
https://pixabay.com/photos/bus-school-school-bus-education-2690793/
https://pixabay.com/photos/back-to-school-school-pen-pencil-183533/
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