I knew his name (Complex).
I know what is his name.
I knew what his name was.
I know what was his name.
I knew what name is.
সঠিক উত্তর:
I knew what his name was.
ব্যাখ্যা ও নোট:
Object-কে clause-এ রূপান্তর করে Complex করতে হয়। 'what his name was' একটি Noun clause যা object হিসেবে কাজ করছে।