Match list I with list II and then select the correct answer from the codes given below the lists.
List I
(1) Isopropylamine
(2) Isopropyl alcohol
(3) Trimethylamine
(4) Tertiary butylamine
List II
(a) 1∘ amine with −NH2 on tertiary carbon
(b) Functional group isomers of ethylmethylamine
(c) A secondary alcohol
(d) A tertiary amine