Pharmacognosy D. Pharma B. Pharma Diploma in Pharmacy
Ans → (b)α-pinene
Explanation → Terpentine oil contains mainly terpenes, alpha-pinene and beta-pinene with lesser amounts of camphene dipentene and terpinolene.
This question is taken from this post → Pharmacognosy Practice test #1 | MCQs for Pharmacy Exams - attemp/practice