What is the TTL value for that ping?

Refer to the exhibit.

Host A pings interface S0/0 on router 3. What is the TTL value for that ping?

A.
252

B.
253

C.
254

D.
255

Explanation:
From the CCNA ICND2 Exam book: “Routers decrement the TTL by 1 every time they
forward a packet; if a router decrements the TTL to 0, it throws away the packet. This
prevents packets from rotating forever.” I want to make it clear that before the router
forwards a packet, the TTL is still remain the same. For example in the topology above,
pings to S0/1 and S0/0 of Router 2 have the same TTL.
The picture below shows TTL values for each interface of each router and for Host B. Notice
that Host A initializes ICMP packet with a TTL of 255: