Choose the correct option.

1 What an amazing finish! Both of the runners are neck and neck / head and head heading towards the finish line.
2 After the drug affair, he was stripped / suspended from competing in any official contests for half a year.
3 It’s a new sport, but it’s getting / catching on quickly. It’s becoming more and more popular each year.
4 Tina is bound to win the race. She’s been in the lead / front since the beginning.