31. Dynamic Memory Allocation-ii

Question.3

A developer creates a driver object with malloc:

class I2C_Driver {
   uint8_t addr;
public:
   I2C_Driver(uint8_t a) : addr(a) { init_hw(); }
   ~I2C_Driver() { deinit_hw(); }
};

I2C_Driver* drv = (I2C_Driver*)malloc(sizeof(I2C_Driver));

What is wrong?

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malloc returns the wrong size for C++ objects
malloc cannot allocate memory for classes
The constructor is never called
Nothing -- malloc works for any type