Tulsi plant has medicinal values due to the presence of the following

1. A

   Inorganic Acid

   Inorganic acids are not the distinctive medicinal fraction of Ocimum sanctum (tulsi). The plant’s value is not explained by mineral acids, so this option is wrong.

2. B

   Organic Acid

   Organic acids occur in many plants; they are not the exam’s named reason for tulsi’s medicinal reputation. This option is not the key.

3. C

   Phenols and Flavonoids

   Tulsi leaves are rich in phenolic compounds and flavonoids (along with eugenol-type essential-oil constituents). Those secondary metabolites are cited for antimicrobial, antioxidant and adaptogenic uses. That is why (c) is the official key.

4. D

   None of the above

   ‘None of the above’ fails because phenols and flavonoids are present and are the intended answer.

Summary. Official key is (c). Medicinal reputation of tulsi is tied to phenols and flavonoids (and related essential-oil phenols), not to a generic inorganic or organic acid label.