Arrange the following elements in order of their number of neutrons, beginning from less to more:

(A) Nitrogen

(B) Silicon

(C) Beryllium

(D) Fluorine

Choose the correct answer from the options given below:

To solve this, I need to find the number of neutrons in each element's most common isotope (Neutrons = Mass number - Atomic number):

(A) Nitrogen: Atomic number = 7, Mass number = 14 → Neutrons = 7

(B) Silicon: Atomic number = 14, Mass number = 28 → Neutrons = 14

(C) Beryllium: Atomic number = 4, Mass number = 9 → Neutrons = 5

(D) Fluorine: Atomic number = 9, Mass number = 19 → Neutrons = 10

Arranging from least to most neutrons: Beryllium (5) < Nitrogen (7) < Fluorine (10) < Silicon (14)

Hence, Option 4: (C), (A), (D), (B) → This correctly orders the elements from the one with fewest neutrons (Beryllium with 5) to the one with most neutrons (Silicon with 14) → correct