Which enzyme was first of all synthesized in crystal form?

Correct option is C

✅ (c) Urease: • First enzyme crystallized by James B. Sumner in 1926 from jack bean. • This proved that enzymes are proteins, a major discovery in biochemistry. • Urease breaks urea into ammonia and CO₂.
❌ (a) Lipase, (b) Zymase: • Important enzymes, but not first to be crystallized.
❌ (d) None of these: • Incorrect as urease was the first.