Which of the following is true in case of railway track maintenance ?

• A. Claw bar is used to correct track alignment while crow bar is used to remove dog spikes
• B. Crow bar is used to correct track alignment while claw bar is used to remove dog spikes
• C. Only claw bar can be used to correct track alignment and remove dog spikes
• D. Only crow bar can be used to correct track alignment and remove dog spikes