Two main types of mechanical locks are available: the warded lock and the tumbler lock.

Which of the following has an incorrect characteristic pertaining to these lock types?

i. The warded lock has wards in it, which are metal projections around the strike plate
ii. The tumbler lock has more pieces and parts than a ward lock.
iii. In a tumbler lock the key fits into a cylinder, which raises the lock metal pieces to the correct height so the bolt can slide to the locked or unlocked position.
iv. In a tumbler lock once all of the metal pieces are at the correct level, the internal bolt can be turned.
v. The warded lock has a spring-loaded bolt with a notch cut in it. The key fits into this notch and slides the bolt from the locked to the unlocked position.

A.
i, ii, iii

B.
i, ii

C.
i

D.
iv

Explanation:
The lock has wards in it, which are metal projections around the
keyhole.