A block of mass `m` is attached to a spring of force constant k .Charges on the block is `q`. A horizontal electric field E is acting in the directions as shown.Block is released with the spring in unstretched position

(a) block will execute `SHM`
(b) time period of osciallation is `2pisqrt(m)/(k)`
(c) amplitude of oscillation is `(qE)/(k)`
(d) Block will oscillate but not simple harmonically
choose the correct answer

Options

A. a and b are true
B. d is true
C. a,b,c are true
D. a,b,c,d are true

Answer

C