A drawframe with a 3 over 3 drafting arrangement, having an eccentric bottom middle roller of 28

Q. A drawframe with a 3 over 3 drafting arrangement, having an eccentric bottom middle roller of 28 mm diameter, is used to produce a sliver. The back zone and front zone drafts are 1.7 and 3.5, respectively. The sliver is further given a draft of 200 to produce a yarn. The wavelength (m) of the periodic fault in the yarn approximately is

(A) 17.6              (B) 29.9                     (C) 61.6                     (D) 104.7

Ans: 61.6