A valid class name starts with a ......., followed by any number of letters, numbers, or underscores.
1. Number
2. Letter
3. Period
4. Underscore
A. Option 1 and 4
B. Option 2 and 3
C. Option 3 and 4
D. Option 1 and 3
Answer: Option B
This Question Belongs to PHP >> Object Oriented Concept
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