<!ELEMENT ELEMENT-NAME (CHILD-NAME )>[1.0]IDENTIFY THE SIGN...

60. - QUESTION BANK CORE XML
QUESTION BANK CORE XML

60. <!ELEMENT element-name (child-name )>

[1.0]

Identify the sign to be placed in the syntax above so that it declares

that the child name

can occur zero or one time inside the element.

a) + c) ?

b) * d) #