<phpPCmodel="DellInspirion3542";settype(&dollar;PCmodel,"integer");echo &dollar;PCmodel;?>16.Select the true statements. Once a constant is defined:

The value can be changed, but it cannot be unset

The value cannot be changed, but the variable can be unset

Neither the value can be changed nor variable can be unset

The value can be changed and variable can be unset

<phpPCmodel="DellInspirion3542";settype(&dollar;PCmodel,"integer");ech

1.	<phpPCmodel="DellInspirion3542";settype(&dollar;PCmodel,"integer");echo &dollar;PCmodel;?> 16.Select the true statements. Once a constant is defined:
A.	The value cannot be changed, but the variable can be unset
B.	Neither the value can be changed nor variable can be unset
C.	The value can be changed, but it cannot be unset
D.	The value can be changed and variable can be unset
Answer» C. The value can be changed, but it cannot be unset