Final answer:
In the adventures of Sherlock Holmes, Dr. John Watson's hand was shot through during the battle of Maiwand, pointing toward his arm being the body part that was struck by a bullet.
Step-by-step explanation:
The battle of Maiwand is a reference from the adventures of Sherlock Holmes, where Dr. John Watson was injured. According to the passage provided, Watson was struck by a Jazrail bullet and afterward is mentioned to 'put his hand on it—the hand that had been shot through' indicating that Watson's hand was the part injured. So, while the options given don't exactly match the injury mentioned in the passage, the closest answer would be c) Arm, assuming there was no separate injury mentioned elsewhere in the original texts.