sir,

in video no. 10 at 21:39 why have you given dimethyl preference over ethyl? in an earlier problem you had said that we dont have to consider prefixes 'di,tri,etc'

(name of compound in this video is --> 2,3Dimethyl-3-ethyl hex-4-en oic acid)

(name of compound in earlier problem was --> 3-Chloro-4,4dimethyl hex-2-en al)