Answer: The connect is ' PARLE AGRO '
1. Kenya Airways - The Director of Parle Products Amol Chauhan died on a flight from Cameroon which was Kenya Airways.
2. Limca - An old brand of Parle agro was sold to Coca cola India
3. Hrithik Roshan - Brand ambassador of PARLE PRODUCTS - Hide & seek, Milano
4. Amir khan - Brand ambassador of PARLE PRODUCTS - Parle -g , Monaco.
Darsheel safary - Brand ambassador of PARLE PRODUCTS- Parle -g.
Miraj and Maulik have cracked this answer.