Question

10
CH(CH),
1 2 3 4 5 6
5 6 7 8 9
CH-CH-CH-CH-CH-CH-CH-CH-CH-CH,
CH-CH-CH-CH
5-sec-Butyl-4-isopropyldecane​( someone please explain how did the ans come ?)

Answer 1

Answer:

I cannot understand the answer

Answer 2

Answer:

sorry I cannot understand the question