Six girls are sitting in a row facing north. Garima is between Reena and Amita, Amita is on the immediate left of Pooja and Arpita is to the left of Rekha. Who is at the extreme left end?
The weights of 4 boxes are 30, 20, 50 and 90 kilograms. Which of the following cannot be the total weight, in kilograms, of any combination of these boxes and in a combination a box can be used only once?