Question:What means ($a == 12) ? 5 : -1?
A If $a equals 12, return value is 5; Otherwise, return value is –1
B If $a equals 12, return value is -1; Otherwise, return value is 5
C If $a equals 5, return value is 12; Otherwise, return value is –1
D If $a equals -1, return value is 5; Otherwise, return value is 12
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