Question

Deficiency of which of the following elements delay flowering in plants?

• A. $Fe$, $Mn$, $Mo$
• B. $N$, $S$, $Mo$
• C. $Ca$, $Mg$, $K$
• D. $N$, $K$, $S$

Answer 1

The correct option is B $N$, $S$, $Mo$

• Nitrogen: an overabundance of nitrogen can delay flowering while a deficiency can reduce yield.

• Molybdenum is a structural component of the enzyme that reduces nitrates to ammonia. Without it, the synthesis of proteins is blocked and plant growth ceases.
  

• Sulfur is a structural component and is required for the production of chlorophyll.

So, the correct answer is "$N,S,Mo$."