નીચેની પ્રક્રિયા શ્રેણીમાં બનતી નીપજ $B$ કઈ છે?

• A
  $1-(4-\text{methylphenyl})\text{ethyl isocyanide}$
• B
  $1-(4-\text{methylphenyl})\text{ethyl isocyanide}$
• C
  $1-(4-\text{methylphenyl})\text{ethyl cyanide}$
• D
  $1-(4-\text{methylphenyl})\text{propyl isocyanide}$