The locking pin that joins the parts of a detachable link is held in position by __________.

Correct Answer: Option B — a lead plug

Detachable links, such as the Kenter or Die-Lock types, use a lead plug to secure the locking pin. The lead is hammered into the hole, where it expands to prevent the pin from vibrating loose during operation, ensuring the integrity of the anchor chain assembly under high tension.