Given,1-Butene and cyclobutane shows:-(A) Position isomerism(B) Ring-Chain isomerism(C) Functional isomerism(D) Metamerism

1-Butene and cyclobutane do not exhibit any of the mentioned isomerisms. Let's break down the options:

(A) Position isomerism: This type of isomerism occurs when the position of functional groups or substituents on a carbon chain is different in two or more isomers. Neither 1-butene nor cyclobutane has different positions of functional groups or substituents to show position isomerism.

(B) Ring-Chain isomerism: Ring-chain isomerism occurs when the same set of atoms can be arranged in a straight-chain structure or a cyclic (ring) structure. 1-Butene is a straight-chain alkene, and cyclobutane is a cyclic (ring) compound. They do not have the same set of atoms arranged differently, so they do not exhibit ring-chain isomerism.

(C) Functional isomerism: Functional isomerism occurs when compounds have the same molecular formula but different functional groups. 1-Butene is an alkene, while cyclobutane is an alkane. They do not have the same functional groups, so they do not exhibit functional isomerism.

(D) Metamerism: Metamerism is a type of structural isomerism that occurs when there is a difference in the number of carbon atoms in the alkyl or functional groups attached to the main carbon chain. Neither 1-butene nor cyclobutane exhibits metamerism because they do not have different alkyl or functional groups attached to the main chain.

Therefore, the correct answer is none of the above options; 1-butene and cyclobutane do not show any of the mentioned isomerisms.