There was no co- operation ________ the boys.

Amongst

Among

Between

With

All of the above

Amongst and Among mean the same though slightly different from each other.

Amongst comes before “The”.

There was no co- operation amongst the boys.

Among is used before consonant sound, while amongst is used before vowel sound.

Among them (“Them” starts consonant sound)

Amongst us (“Us” starts vowel sound)