Answer:
The option 'b' is correct.
Use a Molex to SATA power connector.
Step-by-step explanation:
If there is not other SATA power connector then this is the best option to use molex to SATA power connector.
The main difference between molex and sata power connector is that sata supports 12V, 5V and 3.3V and is future compatible compared to molex connector which supports 12V and 5V and most of the hard drives at present and as well as in future devices supports sata power connections because of its reduced size and it can be inserted in only one direction while if you insert a molex connector upside down it damages the hard drive.