Sent email to HR department. Took a few days for them to call me to respond back. Interview was arranged few weeks later.
Interview
1) Pick 1 question out of 7 questions and write a short essay (around 200 words)
2) This is a group interview where you are given a case study.
3) One on one presentation on the topic you wrote just now / any other topic you would like to talk about. There are few other group presenting at the same time too, so you have to be loud and capture your interviewer's focus and attention.
Took a few days for them to reply back on the acceptance.