Arif is standing . . . . . . . . Samad and Adnan.

There are a few different ways 'among' and 'between' are used. The most common use for 'among' is when something is in or with a group of a few, several, or many things. The most common use of 'between' is when something is in the middle of two things or two groups of things. It is sometimes used in the phrase in between.