The following php variables are declared: | PHP MCQs

$company = 'ABS Ltd';
$$company = ',Sydney';
Which of the following is not a correct way of printing 'ABS Ltd,Sydney'?
a. echo '$company $$company';
b. echo '$company ${$company}';
c. echo '$company ${'ABS Ltd'}';
d. echo '$company {$$company}';

Ans: a