Manoj deposited Rs 29400 for 6 years at a simple interset. He got Rs 4200 as interset after 6 years The annual rate of interset was

Options

A. `2frac(8)(21)%`
B. `2frac(7)(20)%`
C. `3frac(8)(21)%`
D. `4frac(8)(21)%`