One of the main clients of TCS in Hong Kong is
C
Correct answer
Explanation
CIGNA (now part of Cigna Corporation) was indeed one of TCS's major clients in Hong Kong. TCS has had significant operations serving the financial services sector in Hong Kong, and CIGNA was a key account. USAA, MetLife, and JPMC (JPMorgan Chase) are also major financial institutions, but CIGNA was specifically one of the main Hong Kong clients for TCS.