Single low/‘0’ in mustard represents:

Correct option is B

What Is 'Single Low' or 'Zero Type' Mustard?
In the quality classification of mustard and rapeseed, the terms "single low" and "double low" are widely used:
Single low (‘0’ type): Mustard with low erucic acid content.
Double low (‘00’ type): Mustard with low erucic acid and low glucosinolate content.
�� Erucic Acid in Mustard:
Erucic acid is a monounsaturated fatty acid found in high levels in traditional Indian mustard ( Brassica juncea).
High levels (>45%) of erucic acid are considered undesirable for human consumption due to potential cardiotoxic effects.
Therefore, quality breeding programs aim to reduce it to safe levels.
✅ According to international standards (e.g., Codex Alimentarius, Canola standards), erucic acid < 2% of total oil qualifies the mustard variety as "single low".
�� Explanation of Options:
(a) Erucic acid < 4% – ❌ Not strict enough; the threshold for "low" is <2%.
(b) Erucic acid < 2% – ✅ Correct, defines single low (‘0’ type) mustard.
(c) Glucosinolate < 2% – ❌ This refers to the second trait in double low types.
(d) Erucic acid and Glucosinolate < 4% – ❌ Combines both traits, defining double low (‘00’ type) mustard.