Among the following structures `I` to `IV`, it is true that:
`(I) C_(2)H_(5)-overset(CH_(3))overset(|)CH-C_(3)H_(7), (II) CH_(3)-overset(O)overset(||)C-overset(CH_(3))overset(|)CH-C_(2)H_(5)`
`(III) H-overset(H)overset(|)underset(H)underset(|)C^(+), (IV) C_(2)H_(5)-overset(CH_(3))overset(|)CH-C_(2)H_(5)`

Among the following four structures I to IV (I) H_(5)C_(2)-overset(CH_(3))overset(|)(C)H-C_(3)H_(7) (II) H_(3)C-overset(O)overset(|)(C)-overset(CH_(3))overset(|)(C)H-CH_(2)H_(5) (III) H-underset(H)underset(|)overset(H)overset(|)(H^(+)) (IV) H_(5)C_(2)-overset(CH_(3))overset(|)(C)H-C_(2)H_(5) In is true that

Among the following four structures I to IV C_(2)H_(5)-overset(CH_(3))overset(|)underset((I))(CH)-C_(3)H_(7) CH_(3)overset(O)overset(||)(C)overset(CH_(3))overset(|)underset((II))(CHC_(2))H_(5) H-overset(H)overset(|**)underset(III)underset(H)underset(|)C C_(2)H_(5)-overset(CH_(3))overset(|)underset((IV))(CH)-C_(2)H_(5) it is ture thate

Among the following structures I to IV :- C_2 H_5-overset(CH_3)overset("|")(CH)-C_3H_7 (ii) CH_3-overset("O")overset("||")(C)-overset(CH_3)overset("|")(CH)-C_2H_5 (iii) H-underset(H)underset("|")overset(H)overset("|")(C) (iv) C_2 H_5-overset(CH_3)overset("|")(CH)-C_2H_5

Among the following structures I to IV :- C_2 H_5-overset(CH_3)overset("|")(CH)-C_3H_7 (ii) CH_3-overset("O")overset("||")(C)-overset(CH_3)overset("|")(CH)-C_2H_5 (iii) H-underset(H)underset("|")overset(H)overset("|")(C) (iv) C_2 H_5-overset(CH_3)overset("|")(CH)-C_2H_5

For the given four structures , I to IV, which of the following is correct ? underset((I))(C_(2)H_(5)-overset(CH_(3))overset(|)(C)H-C_(3)H_(7)) underset((II))(CH_(3)-overset(O)overset(P)(C)-overset(CH_(3))overset(|)(C)H-C_(2)H_(5)) underset((III))(CH_(3)-overset(O)overset(P)(C ) -overset(C_(2)H_(5))overset(|)(C ) H -C_(2)H_(5)) underset((IV))(C_(2)H_(5)-overset(CH_(3))overset(|)(C)H-C_(2)H_(5))

For the given four structures , I to IV, which of the following is correct ? underset((I))(C_(2)H_(5)-overset(CH_(3))overset(|)(C)H-C_(3)H_(7)) underset((II))(CH_(3)-overset(O)overset(P)(C)-overset(CH_(3))overset(|)(C)H-C_(2)H_(5)) underset((III))(CH_(3)-overset(O)overset(P)(C ) -overset(C_(2)H_(5))overset(|)(C ) H -C_(2)H_(5)) underset((IV))(C_(2)H_(5)-overset(CH_(3))overset(|)(C)H-C_(2)H_(5))

IUPAC name of C_(2)H_(5)-overset(C_(2)H_(5))overset(|)CH-overset(Cl)overset(|)CH-overset(CH_(3))overset(|)CH-CH_(2)-CH_(2)-CH_(3)

IUPAC name of C_(2)H_(5)-overset(C_(2)H_(5))overset(|)CH-overset(Cl)overset(|)CH-overset(CH_(3))overset(|)CH-CH_(2)-CH_(2)-CH_(3)

The molecules CH_(3)-overset(O)overset(||)C-CH_(2) -overset(O)overset(||)C-O-C_(2)H_(5) and CH_(3)-overset(OH)overset(|)C-OH-overset(O)overset(||)C-O-C_(2)H_(5) are