Consider the following statement
(A) NF$$_3$$ molecules has a trigonal planar structure.
(B) Bond Length of N$$_2$$ is shorter than O$$_2$$.
(C) Isoelectronic molecules or ions have identical bond order.
(D) Dipole moment of H$$_2$$S is higher than that of water molecule.
Choose the correct answer from the options given below:

Analyzing each statement:

(A) NF₃ has trigonal planar structure: NF₃ has 3 bond pairs + 1 lone pair on N → pyramidal (like NH₃), NOT trigonal planar. Incorrect.

(B) Bond length of N₂ is shorter than O₂: N₂ has bond order 3 (triple bond, length ~1.10 Å). O₂ has bond order 2 (double bond, length ~1.21 Å). So N₂ is shorter. Correct.

(C) Isoelectronic molecules or ions have identical bond order: Isoelectronic species have the same number of electrons and similar electronic configuration, so they have the same bond order. For example, CO, N₂, NO⁺ are isoelectronic with bond order 3. Correct.

(D) Dipole moment of H₂S is higher than H₂O: H₂O has a dipole moment of 1.85 D while H₂S has 0.97 D. H₂O has a higher dipole moment due to the greater electronegativity of O and the bond angle. Incorrect.

Correct statements: B and C.

This matches option 4: (B) and (C) are correct.