&lt;?php$on_e = 1;$tw_o = 2;$thre_e = 3;$fou_r = 4;echo $on_e / $tw_o + $thre_e / $fou_r; ?&gt;
A. 0.75
B. 0.05
C. 1.25
D. Error
Answer:A
&lt;?php$on_e = 1;$tw_o = 2;$thre_e = 3;$fou_r = 4;echo $on_e / $tw_o + $thre_e / $fou_r; ?&gt;
A. 0.75 B. 0.05 C. 1.25 D. Error
Explanation: You can use _ in a variable name.