Point out the mobile nutrients in soil:
(A) Cu²⁺, NO₃⁻, Fe²⁺, H₃BO₃
(B) NO₃⁻, Cl⁻, H₂PO₄⁻, MoO₄²⁻
(C) NO₃⁻, Cl⁻, H₃BO₃
(D) NO₃⁻, Cl⁻, H₃BO₃, NH₄⁺
Choose the correct answer from the options given below:

Correct option is B

Mobile nutrients in soil are those that can move freely with soil water and are easily available to plants. These include NO₃⁻ (nitrate), Cl⁻ (chloride), and H₃BO₃ (boric acid).
• Cu²⁺ and Fe²⁺ are micronutrients but are relatively immobile.
• NH₄⁺ is less mobile due to adsorption by soil colloids.
Therefore, only option (C) contains exclusively mobile nutrients.