a) 13
b) 14
c) 15
d) 16
Answer: a
Explanation: It provides 13 exceptions: BadFunctionCallException, BadMethodCallException, DomainException, InvalidArgumentException, LengthException, LogicException, OutOfBoundsException, OutOfRangeException, OverflowException, RangeException, RuntimeException, UnderflowException, UnexpectedValueException.
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