Read the given statement carefully and answer the question.
A group of people getting together casually without prior planning and in a relaxed manner is called informal gathering.
Which of the following situations better Ills the above statement?

A

A group celebrates every month on salary day.

B

Invitees gather on the occasion of wedding reception.

C

Soon after the release of mark list, top 10 rankers gather to greet each other.

D

People gather to witness beating retreat at Wagah border in Amritsar.