Step 1: Understanding the usage: The phrase "relieved from his duties" is grammatically incorrect. The correct phrase should be "relieved of his duties."
Step 2: Analyzing each part:
(A) "Mr Rao has been" --- correct.
(B) "relieved from his duties" --- incorrect; should be "relieved of his duties."
"and is expected to be here by tomorrow." --- correct.
Thus, the error is in part B.
Which of the following is an octal number equal to decimal number \((896)_{10}\)?