Step 1: Approach
Recall the common examples under each protein class.
Step 2: Examples
Fibrous: keratin, collagen, myosin. Globular: albumins (egg white, legumelin in legumes), insulin, haemoglobin.
Step 3: Conclusion
Legumelin belongs with the albumins, which are globular proteins, option (B).
Final Answer:
Legumelin is a water-soluble albumin, so it is a globular protein, option (B).
\[ \boxed{\text{Globular protein}} \]