You *can* use the Zebronics PSU 450W, but you shouldn't. Below the level of adequate entry-level PSUs, the PSU is the worst place to cut corners on a PC. Stuff like having enough power and not being on fire are two very important considerations for computer equipment, neither of which I would trust a Zebronics PSU to fulfill.
A Corsair CX or an EVGA B series is the lowest-level PSU I'd ever encourage anyone to build a PC with.