JEE Math Practice Question

At a telephone enquiry system the number of phone cells regarding relevant enquiry follow Poisson distribution with an average of $$5$$ phone calls during $$10$$ minute time intervals. The probability that there is at the most one phone call during a $$10$$-minute time period is :

1. A.$${6 \over {{5^e}}}$$
2. B.$${5 \over 6}$$
3. C.$${6 \over 55}$$
4. D.$${6 \over {{e^5}}}$$