Which of the following is the most abundant element in universe?

What is the correct IUPAC name for a molecule that has two amino groups in opposing (para) locations around a benzene ring?

What is IUPAC name of the compound $\text{CH}_3\text{CH=CHCH=CHCOOH}$ ?

Match List I with List II

List I	List II
(A). Inductive effect	(I). Delocalization of $\pi$ electrons
(B). Hyper-conjugation	(II). Displacement of $\pi$ electrons
(C). Resonance effect	(III). Delocalization of $\sigma$ electrons
	(IV). Displacement of $\sigma$ electrons

Choose the correct answer from the options given below: