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					 Host A (on TCP/IP v4 network A) sends an IP datagram D to host B (also on TCP/IP v4 network B). Assume that no error occurred during the transmission of D. When D reaches B, which of the following IP header field(s) may be different from that of the original datagram D?
(i) TTL (ii) Checksum (iii) Fragment Offset 
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-  (i) only 
 -  (i) and (ii) only 
 -  (ii) and (iii) only 
 - (i), (ii) and (iii)
 
 -  (i) only 
 
Correct Option: D
When an IP Datagram is transferred from one host to another, TTL, checksum and fragment offset will be changed.