Which one of the following is the appropriate English translation of ঘন্টা শােনা মাত্রই ছেলেরা দৌড়ে বেরিয়ে। গেল?

As soon as the boys heard the bell they ran out.

The boys heard the bell to run out.

The boys heard the bell and ran out.

Immediately rings the bell and the boys run out.

. Run the boys with the bell.