What are the two banks that formed the Standard Chartered Bank?

Options:
A) National Stock Exchange of India and The Chartered Bank of India, Australia and China
B) The Chartered Bank of India, Australia and China and Temasek Holdings
C) Bank of Tokyo and United Bank of Arizona
D) The Chartered Bank of India, Australia and China, and Standard Bank of British South Africa
 
Answer : The Chartered Bank of India, Australia and China, and Standard Bank of British South Africa