Consider the following tributaries of river Ganga :
1. Gandak
2. Kosi
3. Ghaghara
4. Gomti
Which one of the following is the correct order of the above rivers from east to west?

Arrange the following hills according to their location from north to south:

$1$. Nallamala hills

$2$. Shevaroy hills

$3$. Palkonda hills

$4$. Javadi hills

The property which helps an insect to move on the surface of the water is ______:

Which among the following rivers flows through Tibet and is known as the Yarlung Tsangpo?