Which of the following rules is FALSE with respect to XML structure?

DSSSB TGT/PGT · 2018 · PGT Computer Science (Female) · 26 Jul 2018 · Shift 1 · Section II: subject

1. A.

   All XML elements must have proper nesting

2. B.

   XML tags are case insensitive

3. C.

   Attribute values must be quoted

4. D.

   All XML elements must have a closing tag