What should be done by guard if train entering in block section without authority to proceed? A. Stop the Train B. Inform to SM C. Protect the Train D. All of above

The correct answer is D. All of above.

The guard should stop the train, inform the station master, and protect the train.

• Stopping the train will prevent it from entering the block section and colliding with another train.
• Informing the station master will allow them to take action to prevent another train from entering the block section.
• Protecting the train will prevent it from being tampered with or damaged while it is stopped.

It is important for the guard to take all of these actions to ensure the safety of the train and its passengers.