Bind response

[rams]

Hi ,

I have the following zone file:
$ORIGIN td3497.com.
@ IN SOA udns1.ultradns.net. ppk.yahoo.com. (
2010052610 ; serial
10800 ; refresh
3600 ; retry
2592000 ; expire
86400 ; minimum
)
cname.chain.td3497.com. 86400 IN CNAME mx.chain.td3497.com.
mx.chain.td3497.com. 86400 IN MX 34 mx1.chain.td3497.com.
mx1.chain.td3497.com. 86400 IN MX 34 mx2.chain.td3497.com.
mx2.chain.td3497.com. 86400 IN MX 34 mx3.chain.td3497.com.
mx3.chain.td3497.com. 86400 IN A 1.2.3.4
ramesh.td3497.com. 86400 MX 20 .
ramesh.td3497.com. 86400 MX 20 mx1.
cname.td3497.com. 86400 CNAME .
 td3497.com. 86400 IN NS udns2.ultradns.net.
td3497.com. 86400 IN NS udns1.ultradns.net.
;End

I queried for cname domain against bind 9.6.X and got the following response
C:\Documents and Settings\rameshb>dig @localhost cname.td3497.com mx
; <<>> DiG 9.6.1-P1 <<>> @localhost cname.td3497.com mx
; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 681
;; flags: qr aa rd; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0
;; WARNING: recursion requested but not available
;; QUESTION SECTION:
;cname.td3497.com.              IN      MX
;; ANSWER SECTION:
cname.td3497.com.       86400   IN      CNAME   .
;; Query time: 15 msec
;; SERVER: 127.0.0.1#53(127.0.0.1)
;; WHEN: Mon May 31 14:10:32 2010
;; MSG SIZE  rcvd: 47

Here why authority section is not returned? Actually authority section
should be returned with SOA right?
Thanks & Regards,
Ramesh
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