A 50 year old male presented with signs and symptoms of restrictive heart disease.A right ventricular endo-myocardial biopsy revealed deposition of extracellular eosionophilic hyaline material.On transmission electron microscopy, this material is most likely to reveal the presence of -

• A. Weber palade bodies
• B. Concentric whorls of lamellar structures
• C. Non branching filaments of indefinitive length
• D. Cross banded fibres with 67 m periodicity