Which is described as a beneficial element rather than essential?
AScandium
BSamarium
CSilicon
DSulphur
Answer & Solution
Correct answer: C. Silicon
1. Beneficial elements sit outside the 17.
2. Sodium, cobalt and selenium are the others.
3. Silicon is one of them.
_Source: NCERT Class 11 Biology, Ch 12 'Mineral Nutrition'_
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